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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [KBL] "enable_rc6" parameter deprecation brings back freezing"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105962#c29">Comment # 29</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [KBL] "enable_rc6" parameter deprecation brings back freezing"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105962">bug 105962</a>
from <span class="vcard"><a class="email" href="mailto:freedesktop.org@nospam.mooo.com" title="paulz <freedesktop.org@nospam.mooo.com>"> <span class="fn">paulz</span></a>
</span></b>
<pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=105962#c11">comment #11</a>)
<span class="quote">> I'm guessing the DC state toggling is due to GPU activity, probably due to
> updating the clock in your GUI. Could you try preventing these updates (and
> any other GPU activity) for instance by switching away to another VT from
> your GUI and seeing if the freeze still happens? Please also provide a dmesg
> log booting with drm.debug=0x1f up to the freeze to double-check what causes
> the DC state toggling.</span >
i've removed the option to disable i915 rc6 and added instead a udev rule to
lock the GPU frequency and boost (!) frequency to PR1.
ACTION=="add", KERNEL=="card0", SUBSYSTEM=="drm", ATTR{gt_max_freq_mhz}="300",
ATTR{gt_boost_freq_mhz}="300"
Until now no Freeze!! (since yesterday keeping power on)</pre>
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