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My XServer crashes when I unplug the video cable and then try to use an xrandr command on the unplugged output while a fullscreen OpenGL application is running.

This is how I can reproduce it on my Radeon HD 6320 Linux box:

1) DisplayPort is connected and the fullscreen OpenGL application is running fine.

'xrandr -q' gives following output:

DFP1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm

   1920x1200      60.0*+

   1920x1080      60.0

   1600x1200      60.0

   1680x1050      60.0

   1400x1050      60.0

   1280x1024      60.0

   1440x900       60.0

   1280x960       60.0

   1280x800       60.0

   1280x768       60.0

   1280x720       60.0

   1024x768       60.0

   1024x600       60.0

   800x600        60.3

   800x480        60.3

   640x480        59.9

DFP2 disconnected (normal left inverted right x axis y axis)

CRT1 disconnected (normal left inverted right x axis y axis)

2) Unplug DisplayPort while a fullscreen OpenGL application is running.

Now xrandr -q gives following output:

Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 4480 x 1920

DFP1 disconnected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm

DFP2 disconnected (normal left inverted right x axis y axis)

CRT1 disconnected (normal left inverted right x axis y axis)

  1920x1200 (0x98)  154.0MHz

        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock   74.0KHz

        v: height 1200 start 1203 end 1209 total 1235           clock   60.0Hz

At this point the application is still running (although no monitor is attached).

3) Type 'xrandr --output DFP1 --off'. This causes the XServer to crash and it takes the OpenGL application along.

Now 'xrandr -q' gives following output:

Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 4480 x 1920

DFP1 disconnected (normal left inverted right x axis y axis)

DFP2 disconnected (normal left inverted right x axis y axis)

CRT1 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 0mm x 0mm

   1600x1200      60.0*+

   1400x1050      60.0

   1600x900       60.0

   1280x1024      60.0

   1440x900       59.9

   1280x960       60.0

   1366x768       59.8

   1360x768       60.0

   1280x800       59.8

   1152x864       60.0

   1280x768       59.9

   1280x720       60.0

   1024x768       60.0

   1024x600       60.0

   800x600        60.3

   800x480        60.0

   720x480        60.0

   640x480        59.9

I've tested this with FGLRX 13.1, 13.4, 13.10 and 13.11. The XServer I'm using is 1.9.4.

The XServer log is this:

[2660097.426] 0: X (xorg_backtrace+0x26) [0x4a0096]

[2660097.426] 1: X (0x400000+0x60ad9) [0x460ad9]

[2660097.427] 2: /lib/libpthread.so.0 (0x7f5060f8f000+0xe970) [0x7f5060f9d970]

[2660097.427] 3: /usr/lib/xorg/modules/drivers/fglrx_drv.so (swlDalDisplaySetBlank+0x6) [0x7f505e005a36]

[2660097.427] 4: /usr/lib/xorg/modules/drivers/fglrx_drv.so (xdl_x760_FGLRXClientGone+0x18c) [0x7f505deb5d9c]

[2660097.427] 5: X (FreeResourceByType+0x137) [0x449f87]

[2660097.428] 6: /usr/lib/xorg/modules/drivers/fglrx_drv.so (xdl_x760_atiddxExtensionsDisableExclusiveMode+0x94) [0x7f505deb6214]

[2660097.428] 7: /usr/lib/xorg/modules/drivers/fglrx_drv.so (atiddxExtensionsDisableExclusiveMode+0xd) [0x7f505de301bd]

[2660097.428] 8: /usr/lib/xorg/modules/drivers/fglrx_drv.so (0x7f505dabe000+0x54c528) [0x7f505e00a528]

[2660097.429] 9: /usr/lib/xorg/modules/drivers/fglrx_drv.so (swlCfExclusiveModeHandler+0x6f) [0x7f505e0080bf]

[2660097.429] 10: /usr/lib/xorg/modules/drivers/fglrx_drv.so (swlCwddeCI+0x12a) [0x7f505e001a6a]

[2660097.430] 11: /usr/lib/xorg/modules/drivers/fglrx_drv.so (0x7f505dabe000+0x3fc12f) [0x7f505deba12f]

[2660097.430] 12: /usr/lib/xorg/modules/drivers/fglrx_drv.so (0x7f505dabe000+0x3f8e93) [0x7f505deb6e93]

[2660097.430] 13: X (0x400000+0x2d222) [0x42d222]

[2660097.430] 14: X (0x400000+0x211ea) [0x4211ea]

[2660097.430] 15: /lib/libc.so.6 (__libc_start_main+0xff) [0x7f505fa63c3f]

[2660097.430] 16: X (0x400000+0x20db9) [0x420db9]

[2660097.430] Segmentation fault at address (nil)

[2660097.430]

Fatal server error:

[2660097.430] Caught signal 11 (Segmentation fault). Server aborting

[2660097.430]

[2660097.430]

Please consult the The X.Org Foundation support

         at http://wiki.x.org

fglrxinfo gives this:

display: :0.0  screen: 0

OpenGL vendor string: Advanced Micro Devices, Inc.

OpenGL renderer string: AMD Radeon HD 6320 Graphics

OpenGL version string: 4.2.12325 Compatibility Profile Context 13.10