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<body><span class="vcard"><a class="email" href="mailto:phil@phord.com" title="Phil Hord <phil@phord.com>"> <span class="fn">Phil Hord</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [SKL][i915] driver crashes with dual 4k monitors on Intel HD 520"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99908">bug 99908</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>FIXED
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [SKL][i915] driver crashes with dual 4k monitors on Intel HD 520"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99908#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [SKL][i915] driver crashes with dual 4k monitors on Intel HD 520"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99908">bug 99908</a>
from <span class="vcard"><a class="email" href="mailto:phil@phord.com" title="Phil Hord <phil@phord.com>"> <span class="fn">Phil Hord</span></a>
</span></b>
<pre>I built the kernel from drm-tip:
drm-intel-nightly @ 3cbfafbde5bb92b (4.13.0+)
It is more stable for me.
* I do not see any errors reported yet about FIFOs in syslog;
* Attempting to set the mode for 2 monitors to 4k@60hz does not crash, but
neither does it succeed.
* I am able to configure both monitors for 4k@30hz, and this does seem to work
sometimes.
I often get some error reported from xrandr about being unable to apply this
configuration. It's possible some Ubuntu configurator is responding to hotplug
events and fighting with me. I can't quite tell; but I do get an error message
on the GUI sometimes about being unable to apply this requested mode.
After fighting with it via xrandr (for about 2 hours) I can eventually get
4k@30Hz on two monitors at the same time. So the display driver seems to be
doing the right thing now.
I don't know why 60Hz doesn't work, though. Should it work? Is there some video
card limitation that prevents it?
Thanks for your help, and thanks for updating the build guide.</pre>
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