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

[CC]

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