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<p>My laptop (core m5-6y54) starts flickering after returning from
Suspend (to RAM) or other commands touching the video driver
(xrandr, powertop --calibrate, ...)</p>
<p>From kernel (tested with up to 5.7) I get the message:</p>
<p id="yui_3_10_3_1_1589111239449_1529">[drm:intel_<wbr>cpu_fifo_<wbr>underrun_<wbr>irq_handler
[i915]] *ERROR* CPU pipe A FIFO underrun</p>
<p>I added a bug with more details here:</p>
<p><a class="moz-txt-link-freetext"
href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760</a></p>
<p>but guys from Ubuntu seems not able to help (as it is an
upstream bug) !?<br>
</p>
<p>This happend not in older kernels, but these have the problem
not to go in power save states. So I think the fix of that </p>
<p><a class="moz-txt-link-freetext"
href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863489">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863489</a></p>
<p>causes this regression. <br>
</p>
<p>Hope someone can help. For a laptop it is better to have both
- standby and power saving. Thank you.</p>
<p>Arno<br>
</p>
<p><br>
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