[PATCH 0/3] Fix backlight issues on some Windows 8 systems

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Windows 8 introduced new policy for backlight control by pushing it out to
graphics drivers. This appears to have coincided with a range of vendors
adding Windows 8 checks to their backlight control code which trigger either
awkward behaviour (Lenovo) or complete brokenness (some Dells). The simplest
thing to do would be to just disable ACPI backlight control entirely if the
firmware indicates Windows 8 support, but it's entirely possible that
individual graphics drivers might still make use of the ACPI functionality in
preference to native control.

The first two patches in this series are picked from other patchesets aimed at
solving similar problems. The last simply unregisters ACPI backlight control
on Windows 8 systems when using an Intel GPU. Similar code could be added to
other drivers, but I'm reluctant to do so without further investigation as
to the behaviour of the vendor drivers under Windows.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx

--
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




[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux