[Bug 1923335] Re: At shutdown the spinner logo disappears and a second later it comes back frozen for a while (in kernel 5.11 but 5.10.16 works)

Fri Aug 27 12:25:41 UTC 2021

It only took a week of bisecting to track down the kernel regression:

fe0f1e3bfdfeb53e18f1206aea4f40b9bd1f291c is the first bad commit
commit fe0f1e3bfdfeb53e18f1206aea4f40b9bd1f291c
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Thu Oct 1 18:16:35 2020 +0300

    drm/i915: Shut down displays gracefully on reboot

    Implement the pci .shutdown() hook in order to quiesce the
    hardware prior to reboot. The main purpose here is to turn
    all displays off. Some displays/other drivers tend to get
    confused if the state after reboot isn't exactly as they
    expected.

    One specific example was the Dell UP2414Q in MST mode.
    It would require me to pull the power cord after a reboot
    or else it would just not come back to life. Sadly I don't
    have that at hand anymore so not sure if it's still
    misbehaving without the graceful shutdown, or if we
    managed to fix something else since I last tested it.

    For good measure we do a gem suspend as well, so that
    we match the suspend flow more closely. Also stopping
    all DMA and whatnot is probably a good idea for kexec.
    I would expect that some kind of GT reset happens on
    normal reboot so probably not totally necessary there.

    v2: Use the pci .shutdown() hook instead of a reboot notifier (Lukas)
        Do the gem suspend for kexec (Chris)

    Cc: Lukas Wunner <lukas at wunner.de>
    Cc: Chris Wilson <chris at chris-wilson.co.uk>
    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20201001151640.14590-1-ville.syrjala@linux.intel.com
    Reviewed-by: Jani Nikula <jani.nikula at intel.com>
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>

 drivers/gpu/drm/i915/i915_drv.c | 16 ++++++++++++++++
 drivers/gpu/drm/i915/i915_drv.h |  1 +
 drivers/gpu/drm/i915/i915_pci.c |  8 ++++++++
 3 files changed, 25 insertions(+)

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Title:
  [i915] At shutdown the spinner logo disappears and a second later it
  comes back frozen for a while (in kernel 5.11 and later)

Status in linux package in Ubuntu:
  Won't Fix
Status in plymouth package in Ubuntu:
  Triaged
Status in plymouth package in Fedora:
  Unknown

Bug description:
  At shutdown the spinner logo disapear and a scond later it comes back and stay for 15sec. When I remove "splash" from the grub commandline the shutdown is fast (no extra 15 sec.). I can't find any hints in the log. It seem to happen after the log stopped.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu62
  Architecture: amd64
  BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  DefaultPlymouth: /usr/share/plymouth/themes/bgrt/bgrt.plymouth
  DistroRelease: Ubuntu 21.04
  InstallationDate: Installed on 2021-01-29 (71 days ago)
  InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210129)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
   Bus 001 Device 002: ID 0bda:568c Realtek Semiconductor Corp. Integrated Webcam HD
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. Latitude 5580
  Package: plymouth 0.9.5-0ubuntu3
  PackageArchitecture: amd64
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-13-generic root=UUID=469b1c18-e632-4872-a47c-7b36bce081dc ro quiet splash vt.handoff=7
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-13-generic root=UUID=469b1c18-e632-4872-a47c-7b36bce081dc ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 5.11.0-13.14-generic 5.11.7
  Tags:  wayland-session hirsute
  TextPlymouth: /usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
  Uname: Linux 5.11.0-13-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/25/2020
  dmi.bios.release: 1.18
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.18.2
  dmi.board.name: 00C013
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr1.18.2:bd09/25/2020:br1.18:svnDellInc.:pnLatitude5580:pvr:rvnDellInc.:rn00C013:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: Latitude
  dmi.product.name: Latitude 5580
  dmi.product.sku: 07A8
  dmi.sys.vendor: Dell Inc.

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