# Failed upgrade to 8.21 on NanoPC T4

**URL:** https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887
**Category:** Troubleshooting
**Created:** [15 September 2023 15:22 UTC](https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887 "2023-09-15T15:22:55Z")
**Posts on this page:** 1
**Showing post:** 7

<div class="post-metadata">

### Author: ![ivenhov](https://dietpi.com/forum/user_avatar/dietpi.com/ivenhov/32/4632_2.png) [@ivenhov](https://dietpi.com/forum/u/ivenhov)
#### Post date: [16 September 2023 14:05 UTC](https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887/7 "2023-09-16T14:05:47Z")

</div>

This thread seems relevant for USB issue

> [@RK3399 HDMI output and USB 3.0 not working with Linux 6.1](https://dietpi.com/forum/t/rockpi-4b-usb-not-working/17776):
>
> Hi, I have installed the update 8.21.1 (dietpi-update from version 8.20). After reboot one of USB 3.0 ports stopped working. Any ideas can it be software problem? Required Information DietPi version | G\_DIETPI\_VERSION\_CORE=8 G\_DIETPI\_VERSION\_SUB=21 G\_DIETPI\_VERSION\_RC=1 G\_GITBRANCH=‘master’ G\_GITOWNER=‘MichaIng’ Distro version | bookworm Kernel version | Linux Rose 6.1.46-current-rockchip64 #3 SMP PREEMPT Wed Aug 16 16:27:31 UTC 2023 aarch64 GNU/Linux Architecture | arm64 S…

In particular

> [@RK3399 HDMI output and USB 3.0 not working with Linux 6.1](https://dietpi.com/forum/t/rockpi-4b-usb-not-working/17776/22):
>
> So this is the relevant error. Nasty that Armbain’s image is so much older and their APT repo frozen, so it takes long for their users to recognise issues with recent build system and/or linux/u-boot sources … Since this kernel is used on many SBCs and solves a lot of issues, I’m not keen to downgrade for a single USB port of so far 2 SBCs. But I’ll do and upload a build to testing dir to at least assure it is really delated to some change between these kernel versions.

I also have this error in the log

```auto
[1.920702] phy phy-ff800000.phy.6: phy poweron failed --> -110
[1.921280] dwc3 fe900000.usb: error -ETIMEDOUT: failed to initialize core

```

For reference kernel

```auto
root@DietPi:/home/dietpi# uname -a
Linux DietPi 6.1.50-current-rockchip64 #3 SMP PREEMPT Wed Aug 30 14:11:13 UTC 2023 aarch64 GNU/Linux

```

and model detected

```auto
root@DietPi:/home/dietpi# cat /proc/device-tree/model && echo
FriendlyElec NanoPC-T4

```

Version

```auto
root@DietPi:/home/dietpi# cat /etc/*release
PRETTY_NAME="Armbian 23.8.1 bookworm"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.armbian.com"
SUPPORT_URL="https://forum.armbian.com"
BUG_REPORT_URL="https://www.armbian.com/bugs"
ARMBIAN_PRETTY_NAME="Armbian 23.8.1 bookworm"
root@DietPi:/home/dietpi#

```

---

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