Sorry I just realized -- this may not be a kernel regression at all.
Mutter 40 was when atomic KMS started being used by GNOME. But it
doesn't work reliably for all kernel drivers. If that happens to include
vc4 then we just need to add it to Mutter's atomic_driver_deny_list.
As a workaround you can add this to /etc/environment:
MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu Impish)
Assignee: (unassigned) => Daniel van Vugt (vanvugt)
** Changed in: mutter (Ubuntu Impish)
Importance: Undecided => High
** Changed in: mutter (Ubuntu Impish)
Status: New => Incomplete
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/1944397
Title:
HDMI does not display anything with Impish RPi desktop image
Status in linux-firmware-raspi2 package in Ubuntu:
Confirmed
Status in linux-raspi package in Ubuntu:
Fix Committed
Status in mutter package in Ubuntu:
Incomplete
Status in linux-raspi source package in Hirsute:
Fix Committed
Status in linux-firmware-raspi2 source package in Impish:
Confirmed
Status in linux-raspi source package in Impish:
Fix Committed
Status in mutter source package in Impish:
Incomplete
Bug description:
[ Impact ]
The desktop does not come up and the screen stays blank when using
'dtoverlay=vc4-kms-v3d' on a Pi 4 (as is the case in raspi desktop
images). If the desktop does come up, playing video freezes the
desktop and/or the system. The kernel log shows loads of WARNINGs and
potentially firmware errors.
[ Test Case ]
Use a raspi desktop image, play video (youtube or VLC), move windows
around, switch to and from fullscreen video playback.
[ Where problems could occur ]
The fixes are all local to the VC4 driver so (new) issues should only
show up when that driver is in use. Potential problems are UI freezes,
kernel stalls and crashes.
[ Original Description ]
Workaround
----------
With media which you will boot off of change the line dtoverlay=vc4-kms-v3d
to dtoverlay=vc4-fkms-v3d in /system-boot/config.txt
Original Description
--------------------
Have a HDMI display w/o audio hooked up to this RPI4B.
With the latest kernel update the screen does not turn on due to this.
ProblemType: BugDistroRelease: Ubuntu 21.10
Package: linux-image-5.13.0-1007-raspi 5.13.0-1007.8
ProcVersionSignature: Ubuntu 5.13.0-1007.8-raspi 5.13.13
Uname: Linux 5.13.0-1007-raspi aarch64
ApportVersion: 2.20.11-0ubuntu69
Architecture: arm64
CasperMD5CheckResult: unknown
Date: Mon Sep 20 20:56:14 2021
ImageMediaBuild: 20210421
ProcEnviron:
SHELL=/bin/bash
LANG=en_US.UTF-8
TERM=vt100
XDG_RUNTIME_DIR=<set>
PATH=(custom, user)SourcePackage: linux-raspi
UpgradeStatus: Upgraded to impish on 2021-08-17 (34 days ago)
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