Comment 216 for bug 1098216

I've tried to apply the patchset to git master and it doesn't seem to completely fine on my ThinkPad x230.

Brightness keys still don't work on console on pure X. If a power manager is running (xfce4-power-manager) it will work but it already worked on 3.9 so I'm not sure it's really an improvement. One things changes though, is that the lower brightness level really shuts the screen down.

Here's some more info:

root@balvenie:~# dmesg |grep backlight
[ 32.283005] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
[ 32.288788] thinkpad_acpi: Standard ACPI backlight interface available, not loading native one

root@balvenie:~# dmesg |grep i915
[ 0.625098] i915 0000:00:02.0: enabling device (0006 -> 0007)
[ 0.625750] i915 0000:00:02.0: setting latency timer to 64
[ 0.638679] i915 0000:00:02.0: irq 43 for MSI/MSI-X
[ 0.738217] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
[ 1.590831] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 1.590833] i915 0000:00:02.0: registered panic notifier
[ 1.616220] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0

tree /sys/class/backlight/
/sys/class/backlight/
`-- intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight

root@balvenie:~# cat /sys/class/backlight/intel_backlight/max_brightness
4438