[Bug 83461] New: hdmi screen flicker/unusable

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=83461

            Bug ID: 83461
           Summary: hdmi screen flicker/unusable
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.15, 3.16
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: kb at spatium.org
        Regression: No

Since kernel 3.15 I cannot get a stable video output on HDMI. The screen
flickers and blinks, and my dmesg is full of these:

sound hdaudioC1D0: HDMI ATI/AMD: no speaker allocation for ELD

The video card in question is:
Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4200]

Downgrading to 3.14 seems to remove the issue.

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