Comment 166 for bug 568611

Kamal:
Many thanks for your patience and help. I was able to find the patches as you instructed me. I applied the ones from natty on linux-2.6.38-rc6 sources from Debian repositories (package linux-source-2.6.38-rc6). All the patches succeded at once except for the one called "drm/i915/panel: Fix application of legacy backlight value" (on file drivers/gpu/drm/i915/intel_panel.c). The kernel was compiled and installed without problems.
/sys/class/backlight/intel_backlight interface was created and works fine at the moment. It was necessary to use "acpi_backlight=vendor" parameter to use the hotkeys. I'm using a Dell Studio 1558 with intel graphics by the way.
I will try to apply the patches on current stable release linux-2.6.37 and make "intel_panel.c patch" work.
Please let me know if I should paste my results in a different place, since this is an Ubuntu bug report and I'm working on Debian.