[Bug 70055] New: Driver is not respecting vsync option with a Intel<<AMD prime setup

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70055

          Priority: medium
            Bug ID: 70055
          Assignee: chris at chris-wilson.co.uk
           Summary: Driver is not respecting vsync option with a
                    Intel<<AMD prime setup
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: rune at megahurts.dk
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

rendering using the Intel GPU the frame rate maxes out at 60, but rendering
using a AMD GPU does not appear to be bound by the display rate at all.

With simple games and game menus, the frame rate can easely exceed 100 fps on a
AMD 6630M, and not all apps/games has fps limiting functionality.

I took a quick look at the source, and it appears to me that there is no code
to synchronize to vsync when copying between prime buffers on different
devices.

Looking at the ati driver, it appears to force vsync synchronization when
copying prime buffers when the the application is running full screen.

Any chance we can get vsync synchronization for prime setups?


Driver version: 2.21.15
Xorg core version: 1.14.3


P.S:
Thank you to everyone who's hard work made this bug report possible =)

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