Launchpad has imported 6 comments from the remote bug at https://bugzilla.novell.com/show_bug.cgi?id=711339.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2011-08-09T18:52:07+00:00 Kaelinphilipp wrote: Created an attachment (id=445026) dmesg User-Agent: Opera/9.80 (X11; Linux x86_64; U; de) Presto/2.9.168 Version/11.50 After a fresh restart the adjustment of the lcd brightness works correctly. After putting the system to suspend this won't work. Also after a second time putting to suspend it won't work. Reproducible: Always Steps to Reproduce: 1. Restart if you've done a suspend recently. 2. Try Adjusting brightness (on my Notebook using Fn+F6/F7), this should work. 3. Put the system to suspend mode. 4. Wake up the system from suspend and try the steps named in 2 again Actual Results: In both cases (before and after suspend) the KDE brightness widget is shown correctly but brightness won't change after suspend. Expected Results: Adjusting brightness should work like after a fresh restart. System: Toshiba Tecra R850-11M openSuse 11.4 / 2.6.37.6-0.7-desktop / KDE 4.7 The actual state is also after a suspend shown correctly in the following file: cat /proc/acpi/toshiba/lcd brightness: 5 brightness_levels: 8 When adjusting the brightness using the keys the value in the file above is actualized corrctly. In /var/log/messages and dmesg (also as attachment) the following line appears: Aug 9 20:38:02 linux-h81p kernel: [ 899.913018] ACPI: Failed to switch the brightness Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/0 ------------------------------------------------------------------------ On 2011-09-05T12:11:27+00:00 Kaelinphilipp wrote: 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 Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/1 ------------------------------------------------------------------------ On 2011-09-14T09:22:10+00:00 Kaelinphilipp wrote: Created an attachment (id=450630) /var/log/pm-suspend.log Linux linux-h81p.site 3.0.4-43-desktop #1 SMP PREEMPT Wed Aug 31 09:30:44 UTC 2011 (a432f18) x86_64 x86_64 x86_64 GNU/Linux Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/2 ------------------------------------------------------------------------ On 2011-09-14T09:33:19+00:00 Kaelinphilipp wrote: 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 Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/3 ------------------------------------------------------------------------ On 2012-01-16T11:31:09+00:00 Kaelinphilipp wrote: Created an attachment (id=471331) Files in /sys/containig bright and their values Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/4 ------------------------------------------------------------------------ On 2012-01-16T11:38:59+00:00 Kaelinphilipp wrote: 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. Reply at: https://bugs.launchpad.net/linux/+bug/935778/comments/5 ** Changed in: opensuse Status: Unknown => Confirmed ** Changed in: opensuse Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/935778 Title: Various Toshiba laptops - brightness controls work on first boot, but do nothing after suspend/resume to RAM. 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