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

[CC]

On Wed, Jan 25, 2012 at 3:08 PM, Graeme Russ <graeme.russ at gmail.com> wrote:
> 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

lm_sensors lets you monitor voltages and temperatures. Unfortunately,
sensors-detect didn't detect all sensors for me, but maybe you are
luckier.