[Bug 97392] New: blank/dpms off causes X freezing on Redwood with commit 9090309e057dc703d1a5bffd88e6cae14108cfc3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97392

            Bug ID: 97392
           Summary: blank/dpms off causes X freezing on Redwood with
                    commit 9090309e057dc703d1a5bffd88e6cae14108cfc3
           Product: xorg
           Version: git
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: mkgmafbt at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 125872
  --> https://bugs.freedesktop.org/attachment.cgi?id=125872&action=edit
Xorg log after terminating X

blank/dpms off causes X freezing. Freezing in this case means no unblanking,
keyboard and mouse not working. (dead lock while unblanking?)
When I kill X via ssh, the two displays unblank and I can start X just fine. 

I did a git bisect and commit 9090309e057dc703d1a5bffd88e6cae14108cfc3 "Wait
for pending flips to complete before turning off an output or CRTC" causes the
issue here.

AMD Redwood aka HD5670 (retail), Linux 4.7.x, amd64, mesa and libdrm git, llvm
svn

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