My laptop (core m5-6y54) starts flickering after returning from Suspend (to RAM) or other commands touching the video driver (xrandr ...)
From kernel (tested with up to 5.7) I get the message: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun I added a bug with more details here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760 but guys from Ubuntu seems not able to help. 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 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863489 causes this regression. Hope someone can help. For a laptop it is better to have both - standby and power saving. Thank you. Arno
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