On Wednesday, June 26, 2013 09:52:46 PM Rafael J. Wysocki wrote: > On Wednesday, June 26, 2013 07:31:00 PM Cork wrote: > > Hello. This is my first time sending a report like this, so please excuse me if I'm missing some vital information. > > > > From updating the kernel in Arch linux to 3.9 the brightness controls stopped working on my Clevo P0150HM. I have tried the acpi_backlight=vendor boot parameter but it makes no difference. > > > > While researching this problem I've found that /sys/class/backlight is empty in the versions where the buttons isn't working. Bisecting points to 00c43b9682507dc622c03172fde1032e2a216e9d [1] as the first commit showing the symptoms. > > > > Attached is the output from journalctl -b _TRANSFORM=kernel for the two versions. Not sure what other useful information I can provide apart from that, so please direct me if there is something missing. > > > > [1] https://github.com/torvalds/linux/commit/00c43b9682507dc622c03172fde1032e2a216e9d > > Interesting. > > Please send the output of acpidump from your machine. Also please put initcall_debug into the kernel command line and send dmesg from the working and not working kernels with that. Thanks, Rafael -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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
