[Bug 89522] New: Rotating one output stops updating the other

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89522

            Bug ID: 89522
           Summary: Rotating one output stops updating the other
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: ace at sannes.org
        QA Contact: xorg-team at lists.x.org

It seems that if I only rotate one screen then the screen not rotated does not
update anymore (except for the mouse cursor, which changes according to what is
below it).

To test this I run:
xrandr --output DVI-1 --auto --rotate left --output DVI-0 --auto --primary
That makes DVI-0 stop updating (sometimes most part of an app is grey, or
something else, but it keeps the same and is never updated).
DVI-1 rotates and works as expected.

To restore a working desktop on DVI-0 I run:
xrandr --output DVI-1 --rotate normal

Both screens update if I rotate both:
xrandr --output DVI-1 --auto --rotate left --output DVI-0 --rotate left --auto
--primary

Hardware:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Tahiti XT [Radeon HD 7970/R9 280X]

Software:
Linux kernel 3.19.1 + fix_to_test patch from
https://bugs.freedesktop.org/show_bug.cgi?id=89505

xorg-server 1.17.1

I am happy to test patches and report back.

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