gistfile1.txt

Minecraft 1.2.5  (1333544508000)
 
Machine A: Amd64 Mythbuntu - Ubuntu 12.04 LTS      3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-4ubuntu3)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
01:05.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RS880 [Radeon HD 4250] [1002:9715]

 
Machine B: Amd64  Kubuntu -  Ubuntu 12.04 LTS           3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-4ubuntu3)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
02:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Cedar PRO [Radeon HD 5450] [1002:68f9]

 
It always crashes the screen when the process is running on machine A, regardless of which screen it's running on.

Ie. 
run minecraft, login, screen comes up for a few seconds, then XServer crashes.

Running on machine A, screen A:0, it crashes
Running on machine A, screen B:0, it crashes (ie ssh -X from B to A, then run minecraft)

Running on machine B, screen B:0, it runs
Running on machine B, screen A:0, it runs.

Above, it shows OpenJDK, but it does the same with Sun Java.
 
 
--------------8<-- Xorg.0.log.old -----------------------------
[   810.804] (II) RADEON(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz)
[   810.804] (II) RADEON(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
[   812.279]
Backtrace:
[   812.291] 0: /usr/bin/X (xorg_backtrace+0x26) [0x7fa5f0f9a866]
[   812.291] 1: /usr/bin/X (0x7fa5f0e12000+0x18c70a) [0x7fa5f0f9e70a]
[   812.291] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fa5f0138000+0xfcb0) [0x7fa5f0147cb0]
[   812.291] 3: /usr/lib/x86_64-linux-gnu/dri/libdricore.so (0x7fa5ec003000+0xb3680) [0x7fa5ec0b6680]
[   812.291] 4: /usr/lib/xorg/modules/extensions/libglx.so (0x7fa5eda4d000+0x1027e) [0x7fa5eda5d27e]
[   812.291] 5: /usr/lib/xorg/modules/extensions/libglx.so (0x7fa5eda4d000+0x375c9) [0x7fa5eda845c9]
[   812.291] 6: /usr/bin/X (0x7fa5f0e12000+0x4e7a1) [0x7fa5f0e607a1]
[   812.291] 7: /usr/bin/X (0x7fa5f0e12000+0x3d6aa) [0x7fa5f0e4f6aa]
[   812.291] 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7fa5eefcd76d]
[   812.291] 9: /usr/bin/X (0x7fa5f0e12000+0x3d99d) [0x7fa5f0e4f99d]
[   812.291] Segmentation fault at address 0xf71e02e0
[   812.292]
Caught signal 11 (Segmentation fault). Server aborting
[   812.292]
---------------------8<---------------