[Bug 111802] SegFault missing slots in framebuffer

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Sep 24 13:47:35 UTC 2019


            Bug ID: 111802
           Summary: SegFault missing slots in framebuffer
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: jeroen at blender.org
        QA Contact: dri-devel at lists.freedesktop.org

This fault has been detected when using Blender (2.80 or master branch)
Steps to reproduce the error:

1. Start Blender
2. Go to edit mode (press tab)
3. Start Merge vertices tool (press ALT-M)
4. Select any mode (press ENTER)

And a segmentation fault happens.
This has been tested on Mesa 18.2.2, 19.0.8 and 19.3.0~dev.

The root cause is that you have a framebuffer with multiple color slots with
empty slots in between. If there is an empty color slot between the color
slots, all textures after this slot are apparently skipped/discarded.

Our work around is to reuse empty slots with other slots.

This issue also existed in the official AMD drivers, but has been solved to our


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