[Bug 28375] [KMS][RV620] Lockup on PM reclock

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https://bugs.freedesktop.org/show_bug.cgi?id=28375

--- Comment #15 from Rafał Miłecki <zajec5@xxxxxxxxx> 2010-06-04 13:48:12 PDT ---
I can confirm it's voltage setting that causes problem. Dropping it from
r600.c::r600_pm_misc makes d-r-t work again.

I didn't test your patch Alex, but it does not make much sense in my case.

1) Looking through all power modes I noticed only 2 different voltages: 950 and
1200.
2) Step is 250 anyway: 0018: USHORT usVoltageStep = 0x00fa (250)

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