Failed assert on plasma load (front buffer == back buffer) with dri2 (not TearFree!)
Submitted by Jacopo De Simoi
Assigned to Chris Wilson @ickle
Link to original bug (#100290)
Description
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