[Bug 79756] New: [Radeon] Resizing Steam windows freezes Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79756

          Priority: medium
            Bug ID: 79756
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [Radeon] Resizing Steam windows freezes Xorg
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: marti at juffo.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 100572
  --> https://bugs.freedesktop.org/attachment.cgi?id=100572&action=edit
kernel.log

The gauntlet continues... After solving bug 79325, Steam now starts, but when I
try to resize any Steam windows, Xorg freezes: it does not react to keyboard
input (VT switching or num lock) and killing Steam doesn't unlock it. But the
mouse cursor still responds to mouse movements.

There is nothing in Xorg logs after the freeze. 

xorg-server 1.15.1
linux 3.15-rc8
linux-firmware a4f3bc03f1e7b1f25cc52328981c2a35871e55a1 (with PITCAIRN_mc2.bin)
xf86-video-ati 7.3.0
Tried ati-dri/mesa versions 10.2.0rc5 as well as 10.1.3
Tried glamor-egl git a4fbc7732a1e56de385f50b778aafbdd186e015c as well as 0.6.0
(patched with cccfea4454949e3e376be42bb230603848997195 per bug 79325)

gdb dump at the time of freeze:
(gdb) thread apply all bt

Thread 2 (Thread 0x7f34a3efd700 (LWP 630)):
#0  0x00007f34ae00cb2f in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f34a65679cb in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f34a6567117 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f34ae008124 in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f34acd374bd in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f34aeac5880 (LWP 553)):
#0  0x00007f34ae00f38c in __lll_lock_wait () from /usr/lib/libpthread.so.0
#1  0x00007f34ae00ab3c in _L_lock_553 () from /usr/lib/libpthread.so.0
#2  0x00007f34ae00a91a in pthread_mutex_lock () from /usr/lib/libpthread.so.0
#3  0x00007f34aad16fae in eglCreateImageKHR () from /usr/lib/libEGL.so.1
#4  0x00007f34aaf35e21 in glamor_egl_create_textured_pixmap () from
/usr/lib/xorg/modules/libglamoregl.so
#5  0x00007f34a77e1ac0 in ?? () from
/usr/lib/xorg/modules/drivers/radeon_drv.so
#6  0x00007f34a77e1e26 in ?? () from
/usr/lib/xorg/modules/drivers/radeon_drv.so
#7  0x00007f34a77d8819 in ?? () from
/usr/lib/xorg/modules/drivers/radeon_drv.so
#8  0x00000000005554c3 in ?? ()
#9  0x000000000055628f in ?? ()
#10 0x0000000000556690 in DRI2GetBuffersWithFormat ()
#11 0x00007f34a7c2e661 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#12 0x00007f34a656383a in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#13 0x00007f34a656190a in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#14 0x00007f34a66baa2e in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#15 0x00007f34a66bbb98 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#16 0x00007f34a668d9c0 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#17 0x00007f34a66a19d5 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#18 0x00007f34a6676577 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#19 0x00007f34a665d74c in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#20 0x00007f34a66735d4 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#21 0x00007f34a659d403 in ?? () from /usr/lib/xorg/modules/dri/radeonsi_dri.so
#22 0x00007f34aad20fee in ?? () from /usr/lib/libEGL.so.1
#23 0x00007f34aad193c5 in eglMakeCurrent () from /usr/lib/libEGL.so.1
#24 0x00007f34aaf35c08 in glamor_egl_make_current () from
/usr/lib/xorg/modules/libglamoregl.so
#25 0x00007f34aa8cdc69 in glamor_block_handler () from /usr/lib/libglamor.so.0
#26 0x000000000043ad64 in _CallCallbacks ()
#27 0x0000000000588096 in WriteToClient ()
#28 0x00007f34a7c13761 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#29 0x00007f34a7c271d0 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#30 0x0000000000435c8e in ?? ()
#31 0x0000000000439aaa in ?? ()
#32 0x00007f34acc6e000 in __libc_start_main () from /usr/lib/libc.so.6
#33 0x000000000042507e in _start ()

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