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<body><span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - i915.fastboot=1 is broken on Thinkpad S1 Yoga (Haswell)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108773">bug 108773</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">i915 platform</td>
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<td>HSW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - i915.fastboot=1 is broken on Thinkpad S1 Yoga (Haswell)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108773#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - i915.fastboot=1 is broken on Thinkpad S1 Yoga (Haswell)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108773">bug 108773</a>
from <span class="vcard"><a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> <span class="fn">Lakshmi</span></a>
</span></b>
<pre>(In reply to Julius B. from <a href="show_bug.cgi?id=108773#c0">comment #0</a>)
<span class="quote">> I was following the information on
> <a href="https://hansdegoede.livejournal.com/19224.html">https://hansdegoede.livejournal.com/19224.html</a> to enable flicker-free bot on
> Fedora 29.
>
> However, enabling i915.fastboot=1 results in the screen staying black during
> and after boot. No login manager is shown, and I cannot switch VTs via
> CTRL+ALT+F keys (as usual).
>
> This happens on a Thinkpad S1 Yoga (Haswell platform), which incidentally I
> know is one of the Haswell machines available for Intel employees.
>
> Tested kernel versions:
> Fedora kernels 4.18.18/19, 4.19.2-200 and 4.20.0-0.rc2.git2.1.
>
> I havent tested any mainline or git build yet. I reported
> <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1639437">https://bugzilla.redhat.com/show_bug.cgi?id=1639437</a>, and was referred to
> here.
>
> I'll try to create a dmesg with debug information, and attach it here.</span >
Dmesg log from boot with kernel parameters drm.debug=0x1e log_buf_len=4M are
needed from latest drm-tip.
This issue could be duplicate of
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915/HSW] fastboot causing blank screen and kernel lockup"
href="show_bug.cgi?id=104838">https://bugs.freedesktop.org/show_bug.cgi?id=104838</a></pre>
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