# Blank screen on reboot (x86\_64, UEFI, Dell Wyse 3040)
**URL:** https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215
**Category:** Troubleshooting
**Created:** [28 May 2024 22:07 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215 "2024-05-28T22:07:52Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [28 May 2024 22:07 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/1 "2024-05-28T22:07:53Z")
#### Required Information
- DietPi version | `cat /boot/dietpi/.version`
cat /boot/dietpi/.version
G\_DIETPI\_VERSION\_CORE=9
G\_DIETPI\_VERSION\_SUB=4
G\_DIETPI\_VERSION\_RC=2
G\_GITBRANCH=‘master’
G\_GITOWNER=‘MichaIng’
G\_LIVE\_PATCH\_STATUS[0]=‘not applicable’
- Distro version | `echo $G_DISTRO_NAME $G_RASPBIAN`
echo $G\_DISTRO\_NAME $G\_RASPBIAN
bookworm
- Kernel version | `uname --all`
uname --all
Linux DietPi 6.1.0-21-amd64 #1 SMP PREEMPT\_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86\_64 GNU/Linux
- Architecture | `dpkg --print-architecture`
dpkg --print-architecture
amd64
- SBC model | `echo $G_HW_MODEL_NAME` or (EG: RPi3)
Dell Wyse 3040 Thin Client (amd64, UEFI)
- Power supply used | (EG: 5V 1A RAVpower)
5V 3A
- SD card used | (EG: SanDisk ultra)
N/A, internal eMMC.
#### Additional Information (if applicable)
- Can this issue be replicated on a fresh installation of DietPi?
Yes
#### Steps to reproduce
1. Fresh-install DietPi Bookworm UEFI with Secure Boot enabled on a Wyse 3040 Thin Client
2. Attempt to reboot (command, as root: `reboot`)
#### Expected behaviour
- Device should reboot.
#### Actual behaviour
- systems initiates a graceful reboot, then the display goes blank, while the power LED stays on.
- System starts up fine if I hold the power button for a few seconds.
#### Extra details
- Does not happen when live-booting Parted Magic (another linux distro) and initiating a system restart.
---
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [29 May 2024 17:15 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/2 "2024-05-29T17:15:31Z")
Update:
It appears that the issue does not occur when rebooting through an SSH session. But it happens consistently when executing `reboot` in person on the tty (there is no graphical env installed on this machine).
---
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [29 May 2024 19:56 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/3 "2024-05-29T19:56:30Z")
Update:
I replicated the install on an identical system. When I try to reboot, it starts the process, then stops right after it stops the networking service. Nothing happens after. If I then hit Ctrl+Alt+Del, it finishes the rest of the tasks pertaining to a reboot sequence, and reboots fine, then boots fine.
I’ve also done a test install of Ubuntu 24.04. The issue does not happen there.
---
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [30 May 2024 03:06 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/4 "2024-05-30T03:06:50Z")
Update: This does not happen on a clean install of vanilla Debian 12 either.
---
### Author:  [@Jappe](https://dietpi.com/forum/u/Jappe)
#### Post date: [30 May 2024 05:46 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/5 "2024-05-30T05:46:15Z")
You probably need to install `dbus` 🤔
---
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [30 May 2024 21:31 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/6 "2024-05-30T21:31:03Z")
Appreciate the response but nope, `dbus` is installed already.
---
### Author:  [@Bread](https://dietpi.com/forum/u/Bread)
#### Post date: [2 June 2024 02:39 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/7 "2024-06-02T02:39:17Z")
this is happening to me on my 3b+, i need some help fixing it, it is my third install
---
### Author:  [@Joulinar](https://dietpi.com/forum/u/Joulinar)
#### Post date: [2 June 2024 08:20 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/8 "2024-06-02T08:20:16Z")
@Bread if possible, connect a screen to see where it stuck
---
### Author:  [@Bread](https://dietpi.com/forum/u/Bread)
#### Post date: [2 June 2024 18:15 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/9 "2024-06-02T18:15:29Z")
a hat screen?
---
### Author:  [@Joulinar](https://dietpi.com/forum/u/Joulinar)
#### Post date: [3 June 2024 12:44 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/10 "2024-06-03T12:44:55Z")
a monitor connected via HDMI should do it
---
### Author:  [@Jappe](https://dietpi.com/forum/u/Jappe)
#### Post date: [3 June 2024 12:48 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/11 "2024-06-03T12:48:40Z")
If he has the same problem as OP then he has already connected one, which also stays blank after reboot?
---
### Author:  [@Mtarkowski](https://dietpi.com/forum/u/Mtarkowski)
#### Post date: [9 July 2024 14:37 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/12 "2024-07-09T14:37:21Z")
Hi, this is a working solution:
## Hang on shutdown or reboot
There is an issue related to the HSUART DMA support in the kernel that will hang on reboot or shutdown. To prevent this, add those lines to `/etc/modprobe.d/blacklist.conf`:
```conf
blacklist dw_dmac_core
install dw_dmac /bin/true
install dw_dmac_core /bin/true
```
Then, update `initramfs`:
```sh
sudo update-initramfs -u
```
[https://wiki.debian.org/InstallingDebianOn/Dell/Wyse%203040](https://wiki.debian.org/InstallingDebianOn/Dell/Wyse%203040)
---
### Author:  [@SDIY](https://dietpi.com/forum/u/SDIY)
#### Post date: [22 July 2024 22:06 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/13 "2024-07-22T22:06:39Z")
This seems to do the trick on an identical Wyse unit with the latest DietPi installed (as of July 22 2024). Thank you.
---
### Author:  [@system](https://dietpi.com/forum/u/system)
#### Post date: [20 October 2024 22:06 UTC](https://dietpi.com/forum/t/blank-screen-on-reboot-x86-64-uefi-dell-wyse-3040/20215/14 "2024-10-20T22:06:48Z")
This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.