https://bugzilla.novell.com/show_bug.cgi?id=711339 https://bugzilla.novell.com/show_bug.cgi?id=711339#c1 --- Comment #1 from Philipp Kälin 2011-09-05 12:11:27 UTC --- This Problem also exist in Vanilla-Kernel # uname -a Linux linux-h81p.site 3.1.0-rc4-131-g9e79e3e-1-vanilla #1 SMP Wed Aug 31 06:01:54 UTC 2011 (e100209) x86_64 x86_64 x86_64 GNU/Linux -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=711339 https://bugzilla.novell.com/show_bug.cgi?id=711339#c3 --- Comment #3 from Philipp Kälin 2011-09-14 09:33:19 UTC --- To find the problem I attached the file /var/log/pm-suspend.log. I also found out, that this machine is not known by s2ram, although suspend works except the screen brightness. # /usr/sbin/s2ram -n Machine unknown This machine can be identified by: sys_vendor = "TOSHIBA" sys_product = "TECRA R850" sys_version = "PT525E-00D00SS4" bios_version = "Version 3.00 " See http://en.opensuse.org/SDB:Suspend_to_RAM for details. By the way to things: 1) Because I have 8GB RAM and an SSD Harddrive I have no SWAP Partition, but by my side this shouldn't be a problem. 2) As described here (http://memebeam.org/toys/ToshibaAcpiDriver) I tried to edit /proc/acpi/toshiba/lcd manually using the following command: # sudo echo "brightness:4" > /proc/acpi/toshiba/lcd But also with sudo rights I can not write to the file, the error message says "bash: /proc/acpi/toshiba/lcd: Keine Berechtigung" even tough I should have rights for sudo # -rw-r--r-- 1 root root 0 14. Sep 11:19 lcd -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=711339 https://bugzilla.novell.com/show_bug.cgi?id=711339#c5 --- Comment #5 from Philipp Kälin 2012-01-16 11:38:59 UTC --- I loked in /sys/ for all files containing the value "bright". Then I changed the brightness of the screen using the Keys Fnn+F6/F7 and watched for the changes in the files. The tabular is in the attached file:"Files in /sys/containig bright and their values" I mentioned that the value of /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/actual_brightness is always constant after a suspend. Before the suspend it changed. To change the brightness after suspend I did the following: #su #echo 320 > /sys/class/backlight/intel_backlight/brightness Now the file /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/actual_brightness contains the same value as given in the above comand and display brightness is really changed. I tested this with 3.1.0-1.2-desktop and 3.2.0.6449 Vanilla. On both this workaround works fine to change brightness, but the keys Fn+F6/F7 are stil not working. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=711339 https://bugzilla.novell.com/show_bug.cgi?id=711339#c7 --- Comment #7 from Steve Wesemeyer 2013-09-08 21:11:58 UTC --- Actually, I just found the bug report at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/935778 which links to https://bugzilla.kernel.org/show_bug.cgi?id=21012 and comment #19 worked for me (although now the minimum brightness is absolute darkness but at least the FN-keys work) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.