Hi Kamal, Your patched kernel allows brightness control to work on a new Medion Akoya E7216 laptop where the ACPI brightness implementation fails, so thats great! Thanks for the work you have done to make this work on this system.
However I would like to use the same kernel also another range of systems and these systems need the acpi_video method to control the backlight. This gets completely disabled at the moment because of the forced acpi_video=vendor in drivers/acpi/video_detect.c. The system in question does register an msi-wmi backlight handler now with this new kernel, but this one is not working, only the acpi_video method works on this system. Is there a way to get brightness controls working on both systems without using different kernel boot parameters? So the intel stystem using intel_backlight (and not the acpi_video) and the other system using acpi_video (and not msi-wmi)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568611 Title: Screen brightness control fails on Dell Studio 1558 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
