[Bug 102956] Monitor loses signal when quitting Sagara Family

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102956

            Bug ID: 102956
           Summary: Monitor loses signal when quitting Sagara Family
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: fayn at mt2015.com

Reproducable 100% of time. 

I quit Sagara Family from main menu and monitor loses signal instead of showing
desktop. I can restore signal by lowering resolution with ARandR and then
putting 1920x1080 back.

journalctl shows this:

com.deepin.daemon.Display[6672]: manager.go:575: [updateMonitor] Set mode '115'
failed: Invalid output mode: 115

------------------

Graphics:  Card: Advanced Micro Devices [AMD/ATI] Tonga PRO [Radeon R9 285/380]
           Display Server: x11 (X.Org 1.19.3 ) driver: amdgpu Resolution:
1920x1080 at 60.00hz, 1920x1080 at 60.00hz
           OpenGL: renderer: AMD Radeon R9 200 Series (AMD TONGA / DRM 3.15.0 /
4.12.13-1-ARCH, LLVM 5.0.0)
           version: 4.5 Mesa 17.2.1

wine-staging 2.17

------------------

Arch Linux stock kernel does above mentioned behaviour. Linux
4.12.0-1-amd-staging loses signal from second monitor instead of first one as
soon as game is launched, and signal can be restored the same way.

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