OK, I tried after removing the "video" module. I still get a system lock :-(
# cat /proc/acpi/video/*/DOS (before rrmod'ing)
DOS setting: <4> DOS setting: <4>
# cat /proc/acpi/video/*/DOS (after rrmod'ing)
cat: /proc/acpi/video/*/DOS: No such file or directory
/proc/acpi/dsdt is attached
OK, I tried after removing the "video" module. I still get a system lock :-(
# cat /proc/acpi/ video/* /DOS (before rrmod'ing)
DOS setting: <4>
DOS setting: <4>
# cat /proc/acpi/ video/* /DOS (after rrmod'ing)
cat: /proc/acpi/ video/* /DOS: No such file or directory
/proc/acpi/dsdt is attached