On Sun, Jan 6, 2013 at 7:59 AM, Eldad Zack <eldad at fogrefinery.com> wrote: > > Hi Alex, > > Commit 0ecebb9e0d14e9948e0b1529883a776758117d6f "drm/radeon: switch to a > finer grained reset for evergreen" introduced a hard system lockup to my > setup. I found it after bisecting, and confirmed it by reverting it on > the latest mainline ( 5f243b9 ). > > This: > > echo 7 > > /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0/brightness > > Causes a hard lock-up hard, i.e. immediate freeze, without any logs. > > See lspci output and kernel .config below. > If there's any more info I can provide, please let me know.
Do you normally see GPU resets when changing the backlight? Please attach your dmesg output when changing the backlight with the patch reverted. Alex
