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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>
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<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - SKL screen flicker and dmesg [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103229">bug 103229</a>
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<th>Added</th>
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<td>NEW
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<td>NEEDINFO
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - SKL screen flicker and dmesg [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103229#c35">Comment # 35</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - SKL screen flicker and dmesg [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103229">bug 103229</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 Graham Northup from <a href="show_bug.cgi?id=103229#c34">comment #34</a>)
<span class="quote">> Hello from kernel 5.1.3! I have different hardware from this poster, but the
> same symptoms--the noted line in dmesg, and screen flicker on the local
> output. The device is a Surface Pro 1 (notoriously good Linux support, I
> know); I have the output of lshw, lscpu, dmesg, my .config, etc. if anyone
> wants them to be in this report.
>
> This isn't a Fedora system, but I'm more than happy to let this be the test
> monkey for any fixes.
>
> So far, my workaround has been passing "nomodeset" and letting the kernel
> hang onto the efifb. Of course, without DRM/KMS, most graphical environments
> don't work.
>
> I've also tried the other two workaround parameters (i915.enable_dc=0 as an
> interpretation of one, and intel_idle.max_cstate=4 verbatim) to no avail.
> I'd love to try <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - two external screens permanently go blank on HP EliteBook Folio G1"
href="show_bug.cgi?id=108462#c18">https://bugs.freedesktop.org/show_bug.cgi?id=108462#c18</a>, but
> I'm not sure which kernel configs to twiddle to make that show up.</span >
Can you please attach the dmesg from boot with drmtip?</pre>
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