<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL] Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)" href="https://bugs.freedesktop.org/show_bug.cgi?id=94605#c96">Comment # 96</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [SKL] Flashing black screen ([drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun)" href="https://bugs.freedesktop.org/show_bug.cgi?id=94605">bug 94605</a> from <a class="email" href="mailto:dominik232@gmail.com" title="Dominik Klementowski <dominik232@gmail.com>"> Dominik Klementowski</a> <pre>(In reply to Paulo Zanoni from <a href="show_bug.cgi?id=94605#c94">comment #94</a>) > (In reply to Dominik Klementowski from <a href="show_bug.cgi?id=94605#c92">comment #92</a>) > > Latest intel-drm-nightly solved a lot of issues for my graphics - Intel HD > > 520 (Skylake GT2) with Core i5-6200U (it's Acer E5 laptop). > > > > BOOT_IMAGE=/boot/vmlinuz-4.9.0-994-generic root=... ro i915.enable_rc6=0 > > quiet splash > > Why are you using i915.enable_rc6=0? Please test again without that. Ok, I can confirm now - without parameter i915.enable_rc6=0 flickering is still present and pretty often (more than once per minute I guess). I have todays' intel-drm-nightly kernel. dmesg is clear. I only have some pcie errors [ 3.682031] pcieport 0000:00:1c.5: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00e5(Receiver ID) [ 3.682036] pcieport 0000:00:1c.5: device [8086:9d15] error status/mask=00000001/00002000 [ 3.682038] pcieport 0000:00:1c.5: [ 0] Receiver Error (First) I'm not sure if this could be related. I can get rid of those errors using "pci=nomsi" boot param, but this causes another issue - graphics performance gets weak after resume from suspend. (I have only integrated Intel graphics, but I think this laptop has PCI-e port, because there are variants of the same laptop with some NVIDIA GPUs).</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>