Bug#692234: Intel DH77EB (H77): sporadic freeze and increased power consumption

[Ingo <ingo.steiner@gmx.net>]

Am 08.11.2012 16:55, schrieb Jonathan Nieder:

> Ingo wrote:
> 
>> I have now been running kernel 3.3.0-rc6-amd64 for 4 days. I did even
>> try with different BIOS settings for "IGD DVMT Memory" especially with
>> "Maximum DVMT" which according to the manual corresponds to 1.7GB. With
>> this configuration I did have freezes few times a day with Wheezy stock
>> kernel before.
>>
>> This is *fixed in kernel 3.3.0-rc6-amd64*. All is 100% stable.
> 
> That's a comfort.  Thanks for checking.
> 
>> Do you want me to continue with this test?
> 
> No, please use whatever kernel is most convenient for now.  Hopefully
> we will find some patch to test against 3.2.y soon.

I have now extensively tested with kernel 3.4.4-1~experimental.1 from
snapshots with all available BIOS settings for "IGD DVMT Memory" as:
  128 MB
  256 MB
  512 MB
  Maximum DVMT (1.7 GB)

All is 100% stable, s2ram works smoothly, ...

BIOS setting is totally ignored and Wheezy always assigns 256 MB video
RAM according to 'dmesg':

  agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xe0000000

This kernel also enables RC6p:

  [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off

I can't go with a newer kernel, because VirtualBox 4.1.18 does not
support (and crashes) with kernels >= 3.5.

Ingo