Ubuntu
linux package

  1. Bug #257827
  2. Comment #99

Comment 99 for bug 257827

Revision history for this message
Florian Stoll (flostoll) wrote :

Same problem on Ubuntu 12.04 (3.2.0-26-generic) and Thinkpad T500

echo 0 | sudo tee /sys/module/video/parameters/brightness_switch_enabled

or

echo 4 > /proc/acpi/ibm/cmos
echo 5 > /proc/acpi/ibm/cmos

works -> ~9 brightness steps instead of ~5 steps

dmesg: thinkpad_acpi: detected a 8-level brightness capable ThinkPad