system crash on logout

[Jos Dehaes]

On my AMD64 machine, since a week or so, everytime I logout, the system locks up hard. Magic sysrq doesn't work. I need to powercycle the machine to get it back up. I tried with known-good kernels, the same error, so I guess it's not really in the kernel, but a bug in the X-driver? I can not find anything in the logs.

System info:

jos@quattro:~$ uname -a
Linux quattro 2.6.15-23-amd64-k8 #1 SMP PREEMPT Tue May 23 13:51:32 UTC 2006 x86_64 GNU/Linux

Video card is unknown to lspci, but it is a ATI radeon X550.

0000:01:00.0 VGA compatible controller: ATI Technologies Inc: Unknown device 5b63 (prog-if 00 [VGA])
        Subsystem: PC Partner Limited: Unknown device 0500
        Flags: bus master, fast devsel, latency 0, IRQ 66
        Memory at d0000000 (32-bit, prefetchable) [size=64M]
        I/O ports at 9000 [size=256]
        Memory at d5000000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at d4000000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] #10 [0001]
        Capabilities: [80] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-

0000:01:00.1 Display controller: ATI Technologies Inc: Unknown device 5b73
        Subsystem: PC Partner Limited: Unknown device 0501
        Flags: fast devsel
        Memory at d5010000 (32-bit, non-prefetchable) [disabled] [size=64K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] #10 [0001]

[Jos Dehaes (jos-dehaes)]

Forgot to mention, this is a fully up-to-date dapper system.

This is quite a blocking bug, since I can only login once.

[Jos Dehaes (jos-dehaes)]

I found out that it is in the fglrx driver. When I use the vesa or radeon driver, I don't get the crashes. With the ATI driver, always.

[Jos Dehaes (jos-dehaes)]

the updates of today for fglrx didn't solve this.

[Jos Dehaes (jos-dehaes)]

looks like a duplicate of

https://launchpad.net/distros/ubuntu/+source/xorg-driver-fglrx/+bug/30447