RPI 2 Model B Rev 1.1 wrong RAM size ?

Troubleshooting
1

Hi,
I’m new to DietPi and to this forum.

A couple of years ago I was given a RPI 2 Model B Rev 1.1 that’s I’ve been using raspbian for home networking and some other experimenting. I migrated to DietPi following the recommendation of a friend for reducing the RAM usage and extending SD Card life. Kudos to the team for the excellent work!!

Everything runs ok but I believe that it sets the total RAM available incorrectly. Using DietPi v7.1.2.

Details follow:

cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 44.80
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

processor       : 1
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 44.80
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

processor       : 2
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 44.80
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

processor       : 3
model name      : ARMv7 Processor rev 5 (v7l)
BogoMIPS        : 44.80
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xc07
CPU revision    : 5

Hardware        : BCM2835
Revision        : a01041
Serial          : 00000000c1c15b35
Model           : Raspberry Pi 2 Model B Rev 1.1

The specific model (revision a01041) has 1GB that was available in raspbian.

Dietpi sets its memory to 492MB though:

# free -h
              total        used        free      shared  buff/cache   available
Mem:          492Mi       254Mi        52Mi       4.0Mi       184Mi       177Mi
Swap:         511Mi          0B       511Mi




cat /proc/meminfo
MemTotal:         504244 kB
MemFree:           52700 kB
MemAvailable:     181704 kB
Buffers:           19216 kB
Cached:           149516 kB
SwapCached:            0 kB
Active:            89852 kB
Inactive:         315700 kB
Active(anon):        400 kB
Inactive(anon):   242064 kB
Active(file):      89452 kB
Inactive(file):    73636 kB
Unevictable:        1496 kB
Mlocked:            1496 kB
SwapTotal:        524284 kB
SwapFree:         524284 kB
Dirty:                 8 kB
Writeback:             0 kB
AnonPages:        238356 kB
Mapped:            17736 kB
Shmem:              4148 kB
KReclaimable:      21940 kB
Slab:              34504 kB
SReclaimable:      21940 kB
SUnreclaim:        12564 kB
KernelStack:         904 kB
PageTables:         1532 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      776404 kB
Committed_AS:     215708 kB
VmallocTotal:    1556480 kB
VmallocUsed:         980 kB
VmallocChunk:          0 kB
Percpu:              464 kB
CmaTotal:          65536 kB
CmaFree:           23176 kB




# df -h
Filesystem              Size  Used Avail Use% Mounted on
/dev/root                29G  1.8G   27G   7% /
devtmpfs                214M     0  214M   0% /dev
tmpfs                   247M     0  247M   0% /dev/shm
tmpfs                   247M  3.4M  243M   2% /run
tmpfs                   5.0M     0  5.0M   0% /run/lock
tmpfs                   247M     0  247M   0% /sys/fs/cgroup
tmpfs                   502M  260K  502M   1% /tmp
tmpfs                   247M   32K  247M   1% /var/atlasdata
/dev/mmcblk0p1          253M   50M  203M  20% /boot

I tried disabling ramlog and using a swapfile but the available memory remains the same.

Is this a bug or is my understanding wrong?

 # echo $G_HW_MEMORY_SIZE
1024
 # echo $G_HW_MODEL_NAME
RPi 2 Model B (armv7l)

 # echo $G_HW_MANUFACTURER
Sony UK

 # echo $G_HW_MODEL_NAME
RPi 2 Model B (armv7l)

Thanks in advance,

2

MichaIng
can you have a look. I guess we just take the value from /proc/meminfo right?

3

G_HW_MEMORY_SIZE is read from the RPi revision code a01041
The a indicates it’s a 1 GiB RAM RPi model. It’s number 10 in hexadecimal counting and the RAM size is 256*2^(10-8)=1024 (MiB) then. So b would mean 2 GiB and 9 would mean 512 MiB.

I have the same RPi revision here, and free as well as /proc/meminfo report the correct physical RAM size here. Could you paste your kernel/boot messages?

dmesg
4

thanks for looking into it MichaIng .

Here’s the kernel/boot messages

[    0.000000] Booting Linux on physical CPU 0xf00
[    0.000000] Linux version 5.10.17-v7+ (dom@buildbot) (arm-linux-gnueabihf-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1414 SMP Fri Apr 30 13:18:35 BST 2021
[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: Raspberry Pi 2 Model B Rev 1.1
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] Reserved memory: created CMA memory pool at 0x1bc00000, size 64 MiB
[    0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000000000000-0x000000001fffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000001fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000001fffffff]
[    0.000000] On node 0 totalpages: 131072
[    0.000000]   DMA zone: 1152 pages used for memmap
[    0.000000]   DMA zone: 0 pages reserved
[    0.000000]   DMA zone: 131072 pages, LIFO batch:31
[    0.000000] percpu: Embedded 20 pages/cpu s50700 r8192 d23028 u81920
[    0.000000] pcpu-alloc: s50700 r8192 d23028 u81920 alloc=20*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 129920
[    0.000000] Kernel command line: coherent_pool=1M snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 bcm2708_fb.fbwidth=16 bcm2708_fb.fbheight=16 bcm2708_fb.fbswap=1 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000  console=tty1 root=PARTUUID=e8af6eb2-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet net.ifnames=0
[    0.000000] Kernel parameter elevator= does not have any effect anymore.
               Please use sysfs to set IO scheduler for individual devices.
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 437684K/524288K available (9216K kernel code, 1311K rwdata, 2940K rodata, 1024K init, 860K bss, 21068K reserved, 65536K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] ftrace: allocating 31910 entries in 63 pages
[    0.000000] ftrace: allocated 63 pages with 6 groups
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] 	Rude variant of Tasks RCU enabled.
[    0.000000] 	Tracing variant of Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] random: get_random_bytes called from start_kernel+0x3ac/0x580 with crng_init=0
[    0.000000] arch_timer: cp15 timer(s) running at 19.20MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
[    0.000008] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[    0.000020] Switching to timer-based delay loop, resolution 52ns
[    0.000275] Console: colour dummy device 80x30
[    0.000347] printk: console [tty1] enabled
[    0.000400] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)
[    0.000428] pid_max: default: 32768 minimum: 301
[    0.000622] LSM: Security Framework initializing
[    0.000837] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.000858] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.002366] Disabling memory control group subsystem
[    0.002494] CPU: Testing write buffer coherency: ok
[    0.003051] CPU0: update cpu_capacity 1024
[    0.003068] CPU0: thread -1, cpu 0, socket 15, mpidr 80000f00
[    0.004345] Setting up static identity map for 0x100000 - 0x10003c
[    0.004543] rcu: Hierarchical SRCU implementation.
[    0.005476] smp: Bringing up secondary CPUs ...
[    0.006695] CPU1: update cpu_capacity 1024
[    0.006706] CPU1: thread -1, cpu 1, socket 15, mpidr 80000f01
[    0.008072] CPU2: update cpu_capacity 1024
[    0.008081] CPU2: thread -1, cpu 2, socket 15, mpidr 80000f02
[    0.009342] CPU3: update cpu_capacity 1024
[    0.009351] CPU3: thread -1, cpu 3, socket 15, mpidr 80000f03
[    0.009516] smp: Brought up 1 node, 4 CPUs
[    0.009543] SMP: Total of 4 processors activated (153.60 BogoMIPS).
[    0.009554] CPU: All CPU(s) started in HYP mode.
[    0.009563] CPU: Virtualization extensions available.
[    0.010620] devtmpfs: initialized
[    0.025055] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
[    0.025327] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.025358] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[    0.028312] pinctrl core: initialized pinctrl subsystem
[    0.029546] NET: Registered protocol family 16
[    0.033315] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[    0.038316] audit: initializing netlink subsys (disabled)
[    0.038703] audit: type=2000 audit(0.030:1): state=initialized audit_enabled=0 res=1
[    0.039343] thermal_sys: Registered thermal governor 'step_wise'
[    0.040214] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[    0.040230] hw-breakpoint: maximum watchpoint size is 8 bytes.
[    0.040518] Serial: AMBA PL011 UART driver
[    0.053655] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[    0.070175] raspberrypi-firmware soc:firmware: Attached to firmware from 2021-04-30T13:47:07, variant start
[    0.080182] raspberrypi-firmware soc:firmware: Firmware hash is d7f29d96450abfc77cd6cf011af1faf1e03e5e56
[    0.124762] bcm2835-dma 3f007000.dma: DMA legacy API manager, dmachans=0x1
[    0.126872] SCSI subsystem initialized
[    0.127160] usbcore: registered new interface driver usbfs
[    0.127225] usbcore: registered new interface driver hub
[    0.127296] usbcore: registered new device driver usb
[    0.129184] clocksource: Switched to clocksource arch_sys_counter
[    1.297198] VFS: Disk quotas dquot_6.6.0
[    1.297320] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    1.297521] FS-Cache: Loaded
[    1.297827] CacheFiles: Loaded
[    1.308417] NET: Registered protocol family 2
[    1.309598] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    1.309659] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
[    1.309820] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    1.309894] TCP: Hash tables configured (established 4096 bind 4096)
[    1.310063] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    1.310106] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    1.310606] NET: Registered protocol family 1
[    1.311464] RPC: Registered named UNIX socket transport module.
[    1.311478] RPC: Registered udp transport module.
[    1.311489] RPC: Registered tcp transport module.
[    1.311500] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.312938] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 5 counters available
[    1.316565] Initialise system trusted keyrings
[    1.316914] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[    1.325131] zbud: loaded
[    1.327072] FS-Cache: Netfs 'nfs' registered for caching
[    1.327946] NFS: Registering the id_resolver key type
[    1.327996] Key type id_resolver registered
[    1.328008] Key type id_legacy registered
[    1.328160] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    1.329432] Key type asymmetric registered
[    1.329449] Asymmetric key parser 'x509' registered
[    1.329507] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[    1.329523] io scheduler mq-deadline registered
[    1.329534] io scheduler kyber registered
[    1.331970] bcm2708_fb soc:fb: FB found 1 display(s)
[    1.334058] Console: switching to colour frame buffer device 2x2
[    1.334488] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 16x16
[    1.339357] bcm2835-rng 3f104000.rng: hwrng registered
[    1.339710] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[    1.340554] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[    1.353297] brd: module loaded
[    1.365479] loop: module loaded
[    1.367057] Loading iSCSI transport class v2.0-870.
[    1.368674] libphy: Fixed MDIO Bus: probed
[    1.368967] usbcore: registered new interface driver lan78xx
[    1.369030] usbcore: registered new interface driver smsc95xx
[    1.369056] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[    2.097497] Core Release: 2.80a
[    2.097515] Setting default values for core params
[    2.097549] Finished setting default values for core params
[    2.297898] Using Buffer DMA mode
[    2.297911] Periodic Transfer Interrupt Enhancement - disabled
[    2.297921] Multiprocessor Interrupt Enhancement - disabled
[    2.297934] OTG VER PARAM: 0, OTG VER FLAG: 0
[    2.297962] Dedicated Tx FIFOs mode

[    2.298452] WARN::dwc_otg_hcd_init:1074: FIQ DMA bounce buffers: virt = 9bd14000 dma = 0xdbd14000 len=9024
[    2.298486] FIQ FSM acceleration enabled for :
               Non-periodic Split Transactions
               Periodic Split Transactions
               High-Speed Isochronous Endpoints
               Interrupt/Control Split Transaction hack enabled
[    2.298500] dwc_otg: Microframe scheduler enabled

[    2.298564] WARN::hcd_init_fiq:457: FIQ on core 1

[    2.298578] WARN::hcd_init_fiq:458: FIQ ASM at 807be568 length 36

[    2.298594] WARN::hcd_init_fiq:497: MPHI regs_base at a0810000
[    2.298617] dwc_otg 3f980000.usb: DWC OTG Controller
[    2.298655] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[    2.298707] dwc_otg 3f980000.usb: irq 89, io mem 0x00000000
[    2.298758] Init: Port Power? op_state=1
[    2.298768] Init: Power Port (0)
[    2.299132] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.10
[    2.299189] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    2.299204] usb usb1: Product: DWC OTG Controller
[    2.299217] usb usb1: Manufacturer: Linux 5.10.17-v7+ dwc_otg_hcd
[    2.299230] usb usb1: SerialNumber: 3f980000.usb
[    2.300050] hub 1-0:1.0: USB hub found
[    2.300132] hub 1-0:1.0: 1 port detected
[    2.301141] dwc_otg: FIQ enabled
[    2.301156] dwc_otg: NAK holdoff enabled
[    2.301166] dwc_otg: FIQ split-transaction FSM enabled
[    2.301182] Module dwc_common_port init
[    2.301547] usbcore: registered new interface driver usb-storage
[    2.301795] mousedev: PS/2 mouse device common for all mice
[    2.302903] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[    2.305085] sdhci: Secure Digital Host Controller Interface driver
[    2.305100] sdhci: Copyright(c) Pierre Ossman
[    2.305711] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
[    2.305972] sdhci-pltfm: SDHCI platform and OF driver helper
[    2.306820] ledtrig-cpu: registered to indicate activity on CPUs
[    2.307139] hid: raw HID events driver (C) Jiri Kosina
[    2.307303] usbcore: registered new interface driver usbhid
[    2.307314] usbhid: USB HID core driver
[    2.311873] Initializing XFRM netlink socket
[    2.311924] NET: Registered protocol family 17
[    2.312084] Key type dns_resolver registered
[    2.312557] Registering SWP/SWPB emulation handler
[    2.312728] registered taskstats version 1
[    2.312762] Loading compiled-in X.509 certificates
[    2.313683] Key type ._fscrypt registered
[    2.313700] Key type .fscrypt registered
[    2.313711] Key type fscrypt-provisioning registered
[    2.325463] bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
[    2.327090] sdhost: log_buf @ (ptrval) (dbd13000)
[    2.375687] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[    2.378400] of_cfs_init
[    2.378704] of_cfs_init: OK
[    2.379900] Waiting for root device PARTUUID=e8af6eb2-02...
[    2.464966] mmc0: host does not support reading read-only switch, assuming write-enable
[    2.469094] mmc0: new high speed SDHC card at address aaaa
[    2.470178] mmcblk0: mmc0:aaaa SC32G 29.7 GiB
[    2.473728]  mmcblk0: p1 p2
[    2.514257] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    2.514363] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[    2.519377] Indeed it is in host mode hprt0 = 00021501
[    2.522007] devtmpfs: mounted
[    2.581023] Freeing unused kernel memory: 1024K
[    2.603926] random: fast init done
[    2.609506] Run /sbin/init as init process
[    2.609517]   with arguments:
[    2.609527]     /sbin/init
[    2.609536]   with environment:
[    2.609555]     HOME=/
[    2.609565]     TERM=linux
[    2.729248] usb 1-1: new high-speed USB device number 2 using dwc_otg
[    2.729441] Indeed it is in host mode hprt0 = 00001101
[    2.969649] usb 1-1: New USB device found, idVendor=0424, idProduct=9514, bcdDevice= 2.00
[    2.969676] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    2.970536] hub 1-1:1.0: USB hub found
[    2.970662] hub 1-1:1.0: 5 ports detected
[    3.188473] systemd[1]: System time before build time, advancing clock.
[    3.289288] usb 1-1.1: new high-speed USB device number 3 using dwc_otg
[    3.356070] NET: Registered protocol family 10
[    3.358217] Segment Routing with IPv6
[    3.419951] usb 1-1.1: New USB device found, idVendor=0424, idProduct=ec00, bcdDevice= 2.00
[    3.419988] usb 1-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    3.423581] smsc95xx v2.0.0
[    3.458496] systemd[1]: systemd 241 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[    3.460584] systemd[1]: Detected architecture arm.
[    3.505210] libphy: smsc95xx-mdiobus: probed
[    3.506935] smsc95xx 1-1.1:1.0 eth0: register 'smsc95xx' at usb-3f980000.usb-1.1, smsc95xx USB 2.0 Ethernet, b8:27:eb:c1:5b:35
[    3.558539] systemd[1]: Set hostname to <pollock>.
[    3.866015] systemd-fstab-generator[92]: x-systemd.device-timeout ignored for kronos.home.arpa:/Tech
[    4.594772] random: systemd: uninitialized urandom read (16 bytes read)
[    4.612235] random: systemd: uninitialized urandom read (16 bytes read)
[    4.613452] systemd[1]: Listening on Syslog Socket.
[    4.614260] random: systemd: uninitialized urandom read (16 bytes read)
[    4.614777] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[    4.615015] systemd[1]: Reached target Swap.
[    4.615999] systemd[1]: Listening on udev Kernel Socket.
[    4.661956] systemd[1]: Listening on RPCbind Server Activation Socket.
[    4.662984] systemd[1]: Listening on initctl Compatibility Named Pipe.
[    4.664656] systemd[1]: Listening on Network Service Netlink Socket.
[    5.548178] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[    5.706365] systemd-journald[112]: Received request to flush runtime journal from PID 1
[    6.272844] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[    6.275718] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[    6.275753] [vc_sm_connected_init]: start
[    6.292650] [vc_sm_connected_init]: installed successfully
[    8.399366] Under-voltage detected! (0x00050005)
[    9.168839] random: crng init done
[    9.168893] random: 7 urandom warning(s) missed due to ratelimiting
[    9.827132] systemd-fstab-generator[214]: x-systemd.device-timeout ignored for kronos.home.arpa:/Tech
[   11.307888] systemd-fstab-generator[235]: x-systemd.device-timeout ignored for kronos.home.arpa:/Tech
[   13.153536] SMSC LAN8700 usb-001:003:01: attached PHY driver [SMSC LAN8700] (mii_bus:phy_addr=usb-001:003:01, irq=POLL)
[   13.154204] smsc95xx 1-1.1:1.0 eth0: hardware isn't capable of remote wakeup
[   13.172052] smsc95xx 1-1.1:1.0 eth0: Link is Down
[   15.281158] smsc95xx 1-1.1:1.0 eth0: Link is Up - 100Mbps/Full - flow control off
[   15.281253] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   58.319229] Voltage normalised (0x00000000)
[   64.559195] Under-voltage detected! (0x00050005)
[   68.719176] Voltage normalised (0x00000000)
[  237.199264] Under-voltage detected! (0x00050005)
[  251.759180] Voltage normalised (0x00000000)
5

Ah, how much GPU memory did you apply?

grep gpu_mem /boot/config.txt

And the voltage is not stable enough. To avoid issue, see if you can use a better PSU, sometimes only a better cable is already enough.

6

I set it up as a headless device. Here’s the gpu memory settings

# grep gpu_mem /boot/config.txt
gpu_mem_256=192
gpu_mem_512=448
gpu_mem_1024=512

Any ideas how to reclaim the reserved memory?

I am aware of the PSU issue. Currently this pi is on a mobile phone charger (2A). Planning to buy a rasberry pi one. If you have any other recommendations on PSU I am more than willing to invest in it :slight_smile:

thanks again for all your help

7

Just configured the option via dietpi-config. I thought that the headless option I chose during the initial setup was adequate. Now I get:

 # free -h
              total        used        free      shared  buff/cache   available
Mem:          973Mi       162Mi       608Mi       6.0Mi       202Mi       753Mi
Swap:         511Mi          0B       511Mi

Will probably disable completely the swap setting now :slight_smile:

thanks again.

PS: Recommendations on the PSU still welcome :slight_smile:

8

Not sure what PSU you are running at the moment. Best is to use an official power supply.

From our side we recommend at least 2 GB RAM in total. Running following will ensure this

/boot/dietpi/func/dietpi-set_swapfile 1

But at the end it depends on your needs. :sunglasses:

9

Recommendations welcome. Will monitor and adjust accordingly.

FYI - dietpi scripts fail to send surveys:

 DietPi-Software
─────────────────────────────────────────────────────
 Mode: Installation completed

[FAILED] DietPi-Survey | Sending survey data
 - Command: curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
[ SUB1 ] DietPi-Services > restart
[  OK  ] DietPi-Services | restart : cron
10

what is the error message if you run it directly from CLI

curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
11

I get an error that the file is not found

curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
curl: Can't open 'ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt'!
curl: try 'curl --help' or 'curl --manual' for more information

but if I create a dummy file it succeeds

# touch ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt
# curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
12

you can try to disable and enable the survey to see if it’s working now. Just run dietpi-survey to switch settings

13

Here’s the output

# dietpi-survey
[  OK  ] DietPi-Survey | Setting in /boot/dietpi.txt adjusted: SURVEY_OPTED_IN=0
[FAILED] DietPi-Survey | Purging survey data
 - Command: curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
# dietpi-survey
[  OK  ] DietPi-Survey | Setting in /boot/dietpi.txt adjusted: SURVEY_OPTED_IN=1
[FAILED] DietPi-Survey | Sending survey data
 - Command: curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
14

hmm strange, the file is generated at run time in /tmp/DietPi-Survey and get removed afterwards. In your case it seems the file did not generate

can you open dietpi-survey and select Show. Does it display some data?

15

Yes it does - here’s the dump

┌───────────────────────┤ DietPi-Survey | File viewer ├────────────────────────┐
│                                                                              │
│ #!/bin/bash                                                                  │
│ ((aDIETPI_VERSION[7.1]++))                                                   │
│ ((aGIT_BRANCH[MichaIng/master]++))                                           │
│ ((aDEVICE_NAME[RPi 2 Model B (armv7l)]++))                                   │
│ ((aCPU_ARCH[armv7l]++))                                                      │
│ ((aCPU_COUNT[4]++))                                                          │
│ ((aDISTRO_VERSION[buster]++))                                                │
│ ((aAUTOSTART_OPTION[${aAUTOSTART_NAME[0]:=0}]++))                            │
│ ((aAUTO_SETUP_AUTOMATED[0]++))                                               │
│ ((aNETWORK_INTERFACE[eth0]++))                                               │
│ ((aRASPBIAN[1]++))                                                           │
│ # -------------------------                                                  │
│ # DietPi-Software installs                                                   │
│ # -------------------------                                                  │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[0]:=0}]++))                                  │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[13]:=13}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[15]:=15}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[16]:=16}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[17]:=17}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[20]:=20}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[21]:=21}]++))                                │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[103]:=103}]++))                              │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[105]:=105}]++))                              │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[110]:=110}]++))                              │
│ ((aSOFTWARE[${aSOFTWARE_NAME7_1[130]:=130}]++))                              │
│ # -------------------------                                                  │
│ # DietPi-Benchmark                                                           │
│ # -------------------------                                                  │
│ BENCH_VERSION=2                                                              │
│ BENCH_HW_MODEL=2                                                             │
│ BENCH_CPU='Not tested'                                                       │
│ BENCH_ROOTFS_WRITE='13'                                                      │
│ BENCH_ROOTFS_READ='20'                                                       │
│ BENCH_RAM_WRITE='Not tested'                                                 │
│ BENCH_RAM_READ='Not tested'                                                  │
│ BENCH_CUSTOMFS_WRITE='10'                                                    │
│ BENCH_CUSTOMFS_READ='11'                                                     │
│ BENCH_CPU_TEMP_START='Not tested'                                            │
│ BENCH_CPU_TEMP_END='Not tested'                                              │
│ BENCH_NET_LAN_SPEED='Not tested'                                             │
│                                                                              │
│                                    <Ok>                                      │
│                                                                              │
└──────────────────────────────────────────────────────────────────────────────┘
16

Strange

MichaIng
Any ideas?

17

Strange, we’d need to add some debug code so that the curl (error) output is shown:

sed -i 's/G_EXEC_NOHALT=1/G_EXEC_OUTPUT=1/' /boot/dietpi/dietpi-survey
dietpi-survey 1

About GPU memory: I think we decided against setting GPU memory to minimum when headless gets selected as e.g. the RPi camera module or video encoding requires GPU memory as well but does not necessarily require a local screen. E.g. camera can be streamed to a website instead via mjpg-streamer or such.
But maybe we can reset GPU memory to min when the RPi camera module/extended GPU features are not enabled, i.e. the start_x=1 flag in /boot/config.txt :thinking:.

18

Replying from a mobile phone. Hope it comes through OK :roll_eyes:

Hardware       | RPi 2 Model B (armv7l) (ID=2)
- Kernel version | Linux pollock 5.10.17-v7+ #1414 SMP Fri Apr 30 13:18:35 BST 2021 armv7l GNU/Linux
- Distro         | buster (ID=5,RASPBIAN=1)
- Command        | curl -m 20 -sT ba398bb0-31e3-435a-b4b0-b5a5b2a8b67d.txt sftp://dietpi-survey:upload2dietpi@ssh.dietpi.com/survey/
- Exit code      | 60
- Software title | DietPi-Survey

About the configuration options and the GPU memory allocation, I would vote in favour of your suggestion… But, I am very new to the project.

19

Exit code 60 means “Peer certificate cannot be authenticated with known CA certificates.”: https://manpages.debian.org/curl#EXIT_CODES
Probably the SSH host key has been removed. Please try:

mkdir -p /root/.ssh
>> /root/.ssh/known_hosts
G_CONFIG_INJECT 'ssh.dietpi.com[[:blank:]]' 'ssh.dietpi.com ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDE6aw3r6aOEqendNu376iiCHr9tGBIWPgfrLkzjXjEsHGyVSUFNnZt6pftrDeK7UX+qX4FxOwQlugG4fymOHbimRCFiv6cf7VpYg1Ednquq9TLb7/cIIbX8a6AuRmX4fjdGuqwmBq3OG7ZksFcYEFKt5U4mAJIaL8hXiM2iXjgY02LqiQY/QWATsHI4ie9ZOnwrQE+Rr6mASN1BVFuIgyHIbwX54jsFSnZ/7CdBMkuAd9B8JkxppWVYpYIFHE9oWNfjh/epdK8yv9Oo6r0w5Rb+4qaAc5g+RAaknHeV6Gp75d2lxBdCm5XknKKbGma2+/DfoE8WZTSgzXrYcRlStYN' /root/.ssh/known_hosts
dietpi-survey 1
20

Bingo! Probably the first thing I did after setting up Dietpi was to revert to sshd and copy known_hosts under ~/.ssh/

Just ran the "G_CONFIG_INJECT… " command and the key is now set.

thanks!