[Bug 87715] New: Changing resolution away from 1680x1050 results in scattered display - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 87715] New: Changing resolution away from 1680x1050 results in scattered display
Date: Thu, 25 Dec 2014 18:06:13 +0000	[thread overview]
Message-ID: <bug-87715-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=87715

            Bug ID: 87715
           Summary: Changing resolution away from 1680x1050 results in
                    scattered display
           Product: Mesa
           Version: 10.4
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: bruno-bdMChIhFSYk@public.gmane.org

Created attachment 111332
  --> https://bugs.freedesktop.org/attachment.cgi?id=111332&action=edit
dmesg output just after attempt to switch to 800x600 and recovery

When I boot up and login I end up with the desktop in 1680x1050 resolution. I
can do scaling to get other effective resolutions, but if I actually try to
switch the used resolution to any of the other availble ones (e.g. 1280x1024,
800x600) I end up with parts of the output scattered all over the screen in
medium sized blocks. Usually the screen will switch back to 1680x1050 and work
OK when I don't confirm I want to stay in the new resolution, but sometimes
things end up messed up when it switches back and I ned to shutdown to recover.
I am using x86_64 Fedora 21 with various kernels. I have seen this issue with
the normal 3.17 kernels, 3.18 rawhide nodebug kernels and the mainline 3.19
kernel (the latter fixes another Nouveau problem I had).
Currently mesa is at 10.4, though I think it was at 10.3 when I first switched
this machine over to linux and I still had the same issue.
The reason I care about this is that I want to play some games in wine that use
800x600 and the workaround of using xrandr scaling before and after slows
things down and is ugly.

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