Hi, Matthew Garrett <mjg@xxxxxxxxxx> wrote: > Not all systems expose a firmware or platform mechanism for changing the > backlight intensity on i915, so add native driver support. After switching to 2.6.38-rc1 from 2.6.37 /sys/devices/virtual/backlight/acpi_video0/brightness disappeared and I cannot control the backlight. I tried using acpi_backlight=video but that didn't help (this is an HP laptop BTW and I don't think there is a native backlight control for it). I tried to apply this patch but I get: drivers/gpu/drm/i915/intel_panel.c: In function 'intel_panel_setup_backlight': drivers/gpu/drm/i915/intel_panel.c:319: error: 'struct backlight_properties' has no member named 'type' drivers/gpu/drm/i915/intel_panel.c:319: error: 'BACKLIGHT_RAW' undeclared (first use in this function) drivers/gpu/drm/i915/intel_panel.c:319: error: (Each undeclared identifier is reported only once drivers/gpu/drm/i915/intel_panel.c:319: error: for each function it appears in.) make[4]: *** [drivers/gpu/drm/i915/intel_panel.o] Error 1 make[3]: *** [drivers/gpu/drm/i915] Error 2 make[2]: *** [drivers/gpu/drm] Error 2 make[1]: *** [drivers/gpu] Error 2 make: *** [drivers] Error 2 $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Mobile GME965/GLE960 Integrated Graphics Controller (rev 0c) $ find /sys/ -name "*backlight*" /sys/class/backlight /sys/module/video/parameters/use_bios_initial_backlight Thanks, Ali -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
