[Bug 113891] New: [radeon] Display jitter

* [Bug 113891] New: [radeon] Display jitter
@ 2016-03-07 14:29 bugzilla-daemon
  2016-03-07 14:29 ` [Bug 113891] " bugzilla-daemon
                   ` (5 more replies)
  0 siblings, 6 replies; 7+ messages in thread
From: bugzilla-daemon @ 2016-03-07 14:29 UTC (permalink / raw)
  To: dri-devel

https://bugzilla.kernel.org/show_bug.cgi?id=113891

            Bug ID: 113891
           Summary: [radeon] Display jitter
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.4.4
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: jdelvare@suse.de
        Regression: No

Since updating to kernel v4.4.4 (from v4.4.3), I get vertical jitter on my
display with almost every boot. The picture moves up and down with black
horizontal stripes. This makes the system pretty much unusable.

I bisected it to the following commit:

http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-4.4.y&id=a83b349814dee660caff0a40a22ac2f166c94a8b

drm/radeon/pm: adjust display configuration after powerstate

I am now running v4.4.4 with this commit reverted and so far so good. My
hardware:

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758] (Sapphire HD 6670)

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