http://bugzilla.kernel.org/show_bug.cgi?id=13368
--- Comment #45 from Conrad Kostecki <conik...@gmx.de> 2009-06-18 16:42:55 --- (In reply to comment #44) > hah, then this is a Linux problem rather than a BIOS bug. So what now? > so /sys/class/backlight is empty? > please make sure CONFIG_THINKPAD_ACPI is set. Kernel is compiled with CONFIG_THINKPAD_ACPI=y and booted with acpi_backlight=vendor. DMESG reports this also: X200T / # dmesg |grep thinkpad_acpi thinkpad_acpi: ThinkPad ACPI Extras v0.22 thinkpad_acpi: http://ibm-acpi.sf.net/ thinkpad_acpi: ThinkPad BIOS 7WET50WW (3.00 ), EC 7WHT15WW-1.02 thinkpad_acpi: Lenovo ThinkPad X200 Tablet, model 7450EQG thinkpad_acpi: radio switch found; radios are enabled thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... thinkpad_acpi: Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled thinkpad_acpi: detected a 16-level brightness capable ThinkPad /sys/class/backlight is not empty according to ls: X200T / # ls -la /sys/class/backlight/ total 0 drwxr-xr-x 2 root root 0 Jun 18 2009 . drwxr-xr-x 36 root root 0 Jun 18 2009 .. lrwxrwxrwx 1 root root 0 Jun 18 2009 thinkpad_screen -> ../../devices/virtual/backlight/thinkpad_screen The Hotkeys for brightness seems to be dead. The only way now to use brightness is: X200T / # echo up > /proc/acpi/ibm/brightness X200T / # echo down > /proc/acpi/ibm/brightness -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
