[Bug 91360] New: Other glitches with 'reverse-prime' (--setprovideroutputsource mode)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91360

            Bug ID: 91360
           Summary: Other glitches with 'reverse-prime'
                    (--setprovideroutputsource mode)
           Product: xorg
           Version: 7.7 (2012.06)
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: francois at bobot.eu
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117171
  --> https://bugs.freedesktop.org/attachment.cgi?id=117171&action=edit
xtrace part of the emacs session

When using `xrandr --setprovideroutputsource nouveau Intel` and activating a
monitor through it, emacs buffers are not correctly updated when scrolling.


Steps:
 - use xf86-video-intel master (2c5063938cc809f624e56efd4673041fa8141e81), xorg
7.7
 - open emacs with a file more than one page long
 - xrandr --setprovideroutputsource nouveau Intel
 - xrandr --output DP-1-2 --left-of LVDS1 --auto ([activate a monitor connected
to nvidia card])
 - inside emacs move inside the file (page-up/down or arrow-up/down or middle
button)

result:
 - the display doesn't change, or only some line in it or only half of the
buffer (vertical or horizontal)

expected:
 - the buffer is scrolled normally


You need to activate a monitor connected to the nvidia card for the bug to
manifest, just with setprovideroutputsource the buffer is scrolled normally.
The problem appears if emacs is in the display connected to the intel card or
the nvidia card. The problem also appears in the default file selector of gtk.
The current master of xf86-video-intel is used in order to get the fix for
#75579.

Attached is a part of the command sent by emacs to X (through xtrace) when
going one line down then up with the middle mouse button. Only the last line
was updated, instead of all the buffer.

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