[Bug 1944397] Re: HDMI does not display anything with Impish RPi desktop image

[Dave Jones]

I've reproduced this locally though it seems to take some time for my
system to do so: it boots happily, logs in successfully, and can then be
a good 10 minutes or more before the screen freeze. Playing video, in
particular, appears to make the freeze occur more reliably. The dmesg
output immediately before (and just after) the freeze are:

[  271.583703] [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:76:crtc-3] flip_done timed out
[  271.583697] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out
[  271.584001] [drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [CRTC:76:crtc-3] commit wait timed out
[  281.823842] [drm:drm_crtc_commit_wait [drm]] *ERROR* flip_done timed out
[  281.824121] vc4-drm gpu: [drm] *ERROR* Timed out waiting for commit

I've uploaded an experimental bump for the linux-firmware-raspi2 package
with the latest upstream firmware to the following PPA:

https://launchpad.net/~waveform/+archive/ubuntu/firmware

However, this doesn't appear to fix the issue (or alter its timing) for
me.

@satmandu on the subject of FKMS breaking X11 applications, that was the
case during part of the hirsute cycle but it did get resolved at some
point (I forget exactly when). I've tested xeyes (an X11 application)
with the FKMS work-around in place and there's none of the window
corruption that we were seeing originally, so FKMS should be a
reasonable work-around for now.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to linux-firmware-raspi2 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:
  New
Status in linux-raspi package in Ubuntu:
  Fix Committed
Status in linux-firmware-raspi2 source package in Impish:
  New
Status in linux-raspi source package in Impish:
  Fix Committed

Bug 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)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1944397/+subscriptions