Kernel 3.12.x breaks video playback using XBMC on Intel

[bjoern]

Am Wed, 15 Jan 2014 08:21:48 +0100
schrieb bjoern <lkml at call-home.ch>:

> Hi all,
> 
> I sent this initially to the linux-kernel list but suggestion was to
> send it to dri-devel.
> 
> I use Ubuntu 13.10 x64. I run XBMC Alpha Git 10 using HDMI output.
> 
> I use Ubuntu kernels from mainline
> (http://kernel.ubuntu.com/~kernel-ppa/mainline)
> 
> Kernel 3.8.x / 3.11.10 (and some others kernels) work fine and every
> frame is rendered properly.
> 
> Problem:
> Using kernel 3.12.1 / 3.12.7 (I tested only these two) video playback
> skips several frames per second.
> 
> Mainboard: Intel DH61AG
> BIOS: AGH6110H.86A.0106.2013.0509.1441
> CPU: Intel i3-3240
> Memory: 4 Gb
> One SSD is being used
> 
> I am attaching logs from dmesg - there are visible differences between
> 3.11 and 3.12, e.g.
> 
> ACPI: \_SB_.PCI0.TPMX: can't evaluate _ADR (0x5)
> ACPI: \_SB_.PCI0.PDRC: can't evaluate _ADR (0x5)
> ACPI: \_SB_.PCI0.DOCK: can't evaluate _ADR (0x5)
> 
> Regards,
> Bjoern

I've created a bugzilla entry for this as it seems more appropriate
than the mailing list I guess:
https://bugs.freedesktop.org/show_bug.cgi?id=73667