[Bug 100290] New: Failed assert on plasma load with dri2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100290

            Bug ID: 100290
           Summary: Failed assert on plasma load with dri2
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: wilderkde at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

I am trying to run a Plasma session on sna+DRI2, but the X server crashes right
after displaying the splash screen with a failed assert. ssdm and a simple X
session started with startx work fine. uxa also works fine 

(I am on skylake if that matters) 

[128664.823] (EE) Backtrace:
[128664.823] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x589e36]
[128664.823] (EE) 1: /usr/lib64/xorg/modules/drivers/intel_drv.so
(0x7fe477da3000+0x17f1d5) [0x7fe477f221d5]
[128664.823] (EE) 2: /usr/bin/X (DRI2SwapBuffers+0x1c8) [0x55d968]
[128664.823] (EE) 3: /usr/bin/X (0x400000+0x15f1ec) [0x55f1ec]
[128664.823] (EE) 4: /usr/bin/X (0x400000+0x3587b) [0x43587b]
[128664.823] (EE) 5: /usr/bin/X (0x400000+0x399d8) [0x4399d8]
[128664.823] (EE) 6: /lib64/libc.so.6 (__libc_start_main+0xf0) [0x7fe47c030790]
[128664.824] (EE) 7: /usr/bin/X (_start+0x29) [0x4239d9]
[128664.824] (EE) 
[128664.824] (EE) 
Fatal server error:
[128664.824] (EE) sna_dri2_schedule_swap:3321 assertion 'get_private(back)->bo
!= get_private(front)->bo' failed

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