@Stefan Bader > Have you tried the following?
> 1. Add "options thinkpad_acpi brightness_enable=1" to > /etc/modprobe.d/acpi-video.conf > 2. Update the initrd "sudo update-initramfs -u" > 3. Add "acpi_backlight=vendor" to the kernel commandline (in > /boot/grub/menu.lst) This "somehow" works, but is definitely a workaround and NOT the correct solution. Now there is /proc/acpi/ibm/brightness, and I can adjust the brightness manually by echoing "up" and "down" into this file, (keys did not work) Dmesg reports: [ 1633.052410] thinkpad_acpi: detected a 16-level brightness capable ThinkPad However, I want to make clear that the general ACPI video module works as intended in 2.6.28-15.49 AND also the 2.6.30 mainline builds! There is a specific problem with 2.6.28-15.51. ** Attachment added: "Thinkpad T500 BIOS Revision: 1.19 ACPI Dump" http://launchpadlibrarian.net/31416181/acpidump.txt -- regression: linux-image 2.6.28-15.51 in jaunty-proposed breaks brightness control of T500 https://bugs.launchpad.net/bugs/423296 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
