System crash possibly due to edid errors
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 30/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- linux
- Domain
- operating-systems
Research direction
Start by reproducing the Trixie failure with the Raspberry Pi 400, HDMI splitter, and Decimator arrangement described in the issue. Review the boot/firmware/config.txt setting and vc4-kms-v3d behavior, then collect the missing logs to determine whether the system is crashing. Done means identifying the EDID-related failure and establishing a kernel fix or a confirmed configuration cause.
Written by the indexing model from the issue text.
Description
Describe the bug
I plug an RPi 400 (single 720p HDMI-0 output) into a 1x4 hdmi splitter with the goal of duplicating the computer output on two or more monitors.
It works under both Bookworm (latest updates) and Trixie (latest updates) - both under labwc - either from boot up or adding monitors after system stabilized.
Steps to reproduce the behaviour
If I replace one of the monitors with a Decimator on the HDMI splitter, it works under Bookworm (either from boot up or after stabilized) however computer fails to boot under Trixie-or if already booted and stabilized the os appears to crash.
All attempts to add HDMI entries into the boot/firmware/config.txt are apparently ignored and commenting out #dtoverlay=vc4-kms-v3d prevented the system from booting.
In this configuration when Trixie booting- computer shows the rainbow image on decimator and other monitors on power up, but then no signal after.
However, if i connect the computer directly to the Decimator and then run its HDMI output to the HDMI splitter all monitors work under Trixie.
Device (s)
Raspberry Pi 400
System
Raspberry Pi Bookworm and Trixie, latest updates.
Logs
No response
Additional context
No response
- Dominant language
- C
- Stars
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- Forks
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- Avg merge
- 2d 21h
- Merged PRs (30d)
- 21
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