I have this in my /var/log/syslog, repeated for probably about 100 lines or
so...
nSource: METHOD_CNT, nStatus: INVALID_STATE PROTECTION_FAULT Ch: 1/3 Class
0x004a Mthd 0x0db4 Data 0x00000020:0x00000000
System also runs fine under knoppix, so it does not seem to be hardware
related.
Do you have an nvidia card in that machine?
http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg48977.html
shows the same error from the nouveau driver on 2.6.32 kernel on an older
nvidia card. So same kernel version squeeze uses.
Lenny would not have used nouveau. knoppix likely doesn't either, or if
it does it uses a different kernel version.
One workaround suggested is to add the kernel option 'nouveau.noaccel=1'.
Also make sure X is using the nouveau driver or you can get conflicts
between the kernel frame buffer driver and X.
--
Len Sorensen