Bug 94799

Summary:

[bisected]X segfaults during sddm start up

Product:

xorg

Reporter:

farmboy0+freedesktop

Component:

Driver/AMDgpu

Assignee:

xf86-video-ati maintainers <xorg-driver-ati>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

major

Priority:

medium

Version:

git

Hardware:

Other

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Xorg.log	none

Description farmboy0+freedesktop 2016-04-02 12:01:43 UTC

Created attachment 122680 [details]
Xorg.log

With xf86-video-amdgpu git I cannot start the sddm login manager anymore.
Reverting the driver back to 1.0.1 fixes the problem.
Bisecting shows the following commit as the guilty party:

commit df60c635e1e632233de9dd4b01d63c2b963003f8
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Wed Feb 24 17:06:43 2016 +0900

    glamor: Avoid generating GEM flink names for BOs shared via DRI3 (v2)
    
    We can't create our own struct amdgpu_buffer representation in this case
    because destroying that would make the GEM handle inaccessible to glamor
    as well. So just get the handle directly via dma-buf.
    
    (ported from radeon commit 391900a670addec39515f924265bfa9f8bfa9ec0,
     extended to cache BO handles in the private for non-DRI3 pixmaps as
     well)
    
    v2: Swap whole pixmap privates instead of just BOs in
        amdgpu_dri2_exchange_buffers to avoid invalidating cached BO handles
    
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

Comment 1 Michel Dänzer 2016-04-05 07:55:06 UTC

Thanks for the report. Fixed in Git:

commit aed1c17c43b2c0c983f6fc0973a5224d0faf32d9
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Mon Apr 4 18:28:02 2016 +0900

    glamor: Force GPU rendering to/from pixmaps created via DRI3

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