[Bug 107992] New: xf86-video-amdgpu-18.1.0: video freezes in firefox

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107992

            Bug ID: 107992
           Summary: xf86-video-amdgpu-18.1.0: video freezes in firefox
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: alexander at tsoy.me
        QA Contact: xorg-team at lists.x.org

Created attachment 141654
  --> https://bugs.freedesktop.org/attachment.cgi?id=141654&action=edit
Xorg.1.log

I get constant video freezes in firefox (e.g. on youtube) with
xf86-video-amdgpu-18.1.0. This is a regression since 18.0.1. Long freezes can
be stopped by hovering mouse cursor over the video.


$ git bisect bad
739181c8d3334ff14b5a607895dfdeb29b0d9020 is the first bad commit
commit 739181c8d3334ff14b5a607895dfdeb29b0d9020
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Wed Jul 25 13:00:15 2018 +0200

    Add amdgpu_drm_handle_event wrapper for drmHandleEvent

    Instead of processing DRM events directly from drmHandleEvent's
    callbacks, there are three phases:

    1. drmHandleEvent is called, and signalled events are re-queued to
       _signalled lists from its callbacks.
    2. Signalled page flip completion events are processed.
    3. Signalled vblank events are processed.

    This should make sure that we never call drmHandleEvent from one of its
    callbacks, which would usually result in blocking forever.

:040000 040000 02eec05d22520cd515a137b18ab912a7f2fdc77e
cec6036a94d5f35eceb772a8de0b86c2b62cf913 M      src


$ git bisect log
git bisect start
# good: [9f37a44473ded8c669897379acbc750362c15ec6] Bump version for 18.0.1
release
git bisect good 9f37a44473ded8c669897379acbc750362c15ec6
# bad: [d5e17dc4c78aee5d37de399728066b9be881e044] Bump version for the 18.1.0
release
git bisect bad d5e17dc4c78aee5d37de399728066b9be881e044
# good: [14db71a606128c4a207f43298809af279b77e2a8] modesetting: Record
non-desktop kernel property at PreInit time
git bisect good 14db71a606128c4a207f43298809af279b77e2a8
# good: [7f65a8c9e03bddf2378aaa928460632ed6b1a688] glamor: Check glamor module
version for depth 30 support
git bisect good 7f65a8c9e03bddf2378aaa928460632ed6b1a688
# bad: [34e851d1f284da5afcfe449f349cf1eb5e962408] Use AC_CONFIG_MACRO_DIR
instead of AC_CONFIG_MACRO_DIRS
git bisect bad 34e851d1f284da5afcfe449f349cf1eb5e962408
# bad: [e52872da69ecc84dafb3355839e35b0383f0d228] Defer vblank event handling
while waiting for a pending flip
git bisect bad e52872da69ecc84dafb3355839e35b0383f0d228
# good: [6029794e8a35417faf825491a89b85f713c77fc1] Add
amdgpu_drm_wait_pending_flip function
git bisect good 6029794e8a35417faf825491a89b85f713c77fc1
# bad: [739181c8d3334ff14b5a607895dfdeb29b0d9020] Add amdgpu_drm_handle_event
wrapper for drmHandleEvent
git bisect bad 739181c8d3334ff14b5a607895dfdeb29b0d9020
# first bad commit: [739181c8d3334ff14b5a607895dfdeb29b0d9020] Add
amdgpu_drm_handle_event wrapper for drmHandleEvent

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