[Intel-gfx] Fedora 16, kernel 3.2.0+, i5 2500K, Z68 system freeze

[Graeme Russ]

On 01/25/2012 11:34 PM, CC wrote:
> On Wed, Jan 25, 2012 at 1:28 PM, CC <ccomren at gmail.com> wrote:
>> On Wed, Jan 25, 2012 at 12:47 PM, Graeme Russ <graeme.russ at gmail.com> wrote:
>>> On 01/25/2012 10:31 PM, Chris Wilson wrote:
>>>> On Wed, 25 Jan 2012 12:29:05 +1100, Graeme Russ <graeme.russ at gmail.com> wrote:
>>>>> Hi All,
>>>>>
>>>>> I've been hunting around for information on how to help debug the issue
>>>>> I'm having - Hopefully someone here can help
>>>>>
>>>>> My setup is:
>>>>>  - ASRock Z68 Pro3 Gen3 motherboard
>>>>>  - i5 2500K CPU
>>>>>  - Fedora 16
>>>>>  - Vanilla 3.2.0+ kernel (commt ccb19d263fd1c9e34948e2158c53eacbff369344)
>>>>
>>>> We've had a second report for ASRock Z68 Pro3,
>>>> https://bugs.freedesktop.org/show_bug.cgi?id=44992. There he mentions that
>>>> setting the iGPU voltage to fixed (1.25V) rather than auto in the BIOS
>>>> fixes the system hangs.
>>>
>>> The MB is a ASRock Z68 Pro3-M, mine is a ASRock Z68 Pro3 Gen3
>>>
>>> Also see https://bugzilla.kernel.org/show_bug.cgi?id=42597
>>>
>>> <quote>
>>> I've recently had a problem with an AsRock mainboard. As it turned out,
>>> their voltage control of the integrated GPU was buggy. Setting the voltage
>>> to "fixed 1.5V" instead of "auto" resolved the issue.
>>> </quote>
>>>
>>> I think this is the same person
>>>
>>> I don't know about the ASRock Z68 Pro3-M, but the Gen3 has a EUFI BIOS and
>>> I cannot find an explicit GPU voltage setting. My options are:
>>>
>>> CPU Core Voltage Offset -100mV - +500mV
>>> IGPU Voltage Offset -100mV - +500mV
>>> DRAM Voltage 1.201V - 1.8V
>>> PCH Voltage 0.780V - 1.646V
>>> CPU PLL Voltage 1.548V - 2.310V
>>> VTT Voltage 0.768V - 1.634V
>>> VCCSA Voltage 0.925V - 1.200V
>>>
>>> I have already update to the latest BIOS (1.20)
>>
>> Of course, the Z68 Pro3-M also has an UEFI BIOS. I can select "auto",
>> "offset mode" and "fixed mode" for all voltages. Selecting "fixed
>> mode" lets you set the GPU voltage in absolute terms, i.e., 1.25V.
>>
>> Best,  CC
> 
> I had a look at the manual of the Z68 Pro3 Gen3. While the UEFI setup
> seems to be virtually identical, the description for the iGPU voltage
> only mentions voltage offset. How about setting the offset to 0V?
> Presumably, the offset is about 1.25V anyway.

No luck :(

And nothing in /sys/kernel/debug/dri/0/i915_error_state

Is there any way to log the voltage in Linux?

Regards,

Graeme