RPi4 USB stops working with video playback

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#4,760 4 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
30/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
arch-linux, c

Research direction

Reproduce the failure using kernel 5.10.83-1-rpi-ARCH, the TBS 5990 on an externally powered hub, and Kodi video playback, then compare it with older kernels and the old KMS output. The report names no source file or test; done means isolating a reproducible kernel-level cause and documenting a fix or useful diagnostic result.

Written by the indexing model from the issue text.

Description

I have a dvb-s usb device (TBS 5990) connected to a PI4. It is running ArchLinux:

uname -a
Linux kodipi 5.10.83-1-rpi-ARCH #1 SMP Tue Dec 7 15:22:25 UTC 2021 armv7l GNU/Linux

The USB device is connected to a externally powered hub otherwise the Pi does not boot. I can stream dvb data via network to another computer. As soon as the Pi4 starts video playback in Kodi (from harddisc, from internet, does not matter) then the USB device stops working. After stopping video playback, the device is usable again after some seconds.

This setup has been working with older kernels (< 5.10) and the old kms output. I have tried to debug the issue but dmesg does not show anything related to that. Do you have any ideas what could causing this and how to debug it?

Dominant language
C
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