[Bug 50019] New: after few (de)activating kwin effect, xorg crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=50019

             Bug #: 50019
           Summary: after few (de)activating kwin effect, xorg crash
    Classification: Unclassified
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: d.okias at gmail.com
         QAContact: xorg-team at lists.x.org


Created attachment 61731
  --> https://bugs.freedesktop.org/attachment.cgi?id=61731
xorg.log

HW: AMD A3870K, GPU 6550D on-CPU.
System: Gentoo ~amd64

How to reproduce:
1) let system start with activated kwin OpenGL effects
2) press ALT-F11 (de/activate effects) (with combination with Chrome or Firefox
is best for fast reproduce)
3) after few presses xorg die.

Dmesg here, xorg with -O0 and -ggdb etc. in attachment.

$ dmesg | grep drm -C2
ACPI: acpi_idle registered with cpuidle
Linux agpgart interface v0.103
[drm] Initialized drm 1.1.0 20060810
[drm] radeon defaulting to kernel modesetting.
[drm] radeon kernel modesetting enabled.
[drm] initializing kernel modesetting (SUMO 0x1002:0x9640 0x1043:0x84C8).
[drm] register mmio base: 0xFEB00000
[drm] register mmio size: 262144
ATOM BIOS: General
radeon 0000:00:01.0: VRAM: 256M 0x0000000000000000 - 0x000000000FFFFFFF (256M
used)
radeon 0000:00:01.0: GTT: 512M 0x0000000010000000 - 0x000000002FFFFFFF
[drm] Detected VRAM RAM=256M, BAR=256M
[drm] RAM width 32bits DDR
[TTM] Zone  kernel: Available graphics memory: 3951330 kiB
[TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[TTM] Initializing pool allocator
[TTM] Initializing DMA pool allocator
[drm] radeon: 256M of VRAM memory ready
[drm] radeon: 512M of GTT memory ready.
[drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[drm] Driver supports precise vblank timestamp query.
radeon 0000:00:01.0: irq 42 for MSI/MSI-X
radeon 0000:00:01.0: radeon: using MSI.
[drm] radeon: irq initialized.
[drm] GART: num cpu pages 131072, num gpu pages 131072
[drm] radeon: ib pool ready.
[drm] Loading SUMO Microcode
[drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
radeon 0000:00:01.0: WB enabled
[drm] fence driver on ring 0 use gpu addr 0x10000c00 and cpu addr
0xffff8802244a3c00
[drm] ring test on 0 succeeded in 1 usecs
[drm] ib test on ring 0 succeeded in 0 usecs
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]   VGA
[drm]   HPD2
[drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
[drm]   Encoders:
[drm]     CRT1: INTERNAL_UNIPHY2
[drm]     CRT1: NUTMEG
[drm] Connector 1:
[drm]   DVI-D
[drm]   HPD1
[drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
[drm]   Encoders:
[drm]     DFP1: INTERNAL_UNIPHY2
[drm] Connector 2:
[drm]   DisplayPort
[drm]   HPD3
[drm]   DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458 0x645c 0x645c
[drm]   Encoders:
[drm]     DFP2: INTERNAL_UNIPHY
[drm] Internal thermal controller without fan control
[drm] radeon: power management initialized
[drm] fb mappable at 0xC0142000
[drm] vram apper at 0xC0000000
[drm] size 8294400
[drm] fb depth is 24
[drm]    pitch is 7680
fbcon: radeondrmfb (fb0) is primary device
Console: switching to colour frame buffer device 240x67
fb0: radeondrmfb frame buffer device
drm: registered panic notifier
[drm] Initialized radeon 2.15.0 20080528 for 0000:00:01.0 on minor 0

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