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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#c12">Comment # 12</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:tyx027@gmail.com" title="Filip <tyx027@gmail.com>"> <span class="fn">Filip</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">> Ok, as I understood you already tried booting with i915.enable_dc=0 and that
> didn't get rid of the problem.</span >
Yes, rc6 needs to be turned off as well.
<span class="quote">> Could you confirm that all display outputs were off when the freeze happened?</span >
How can I check this?
<span class="quote">> Do you see any other pattern in what you do before the freeze?</span >
No, unfortunately that is the thing with these freezes - they are completely
random and cannot be straightforwardly reproduced. A stress test e.g. won't
help. From everything that has been written on the forum, they do however seem
to happen more often when the GPU is doing work.
<span class="quote">> 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? </span >
How do I go about doing this?
<span class="quote">> Please also provide a dmesg og booting with drm.debug=0x1f up to the freeze to > double-check what causes the DC state toggling.</span >
<span class="quote">> Could you try if booting with nomodeset the freeze still happens?</span >
<span class="quote">> Ok, please still try if the pstore method provides something.</span >
These I mostly understand how to do, except the pstore method, but there may be
a guide somewhere. Unfortunately I've had to go back to kernel 4.14 and
disabling rc6 due to working on essays for uni deadlines so I will try all this
as soon as I'm in the clear, but will also ask again that the other Linux users
from the forum contribute here if they can.</pre>
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