<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#c78">Comment # 78</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:syphyr@gmail.com" title="syphyr@gmail.com">syphyr@gmail.com</a> <pre>(In reply to Jan from <a href="show_bug.cgi?id=94605#c76">comment #76</a>) > (In reply to Jan from <a href="show_bug.cgi?id=94605#c73">comment #73</a>) > > I have to correct my previous comment. I do get the glitches on all possible > outputs: eDP, DP, HDMI > > The glitch behaves different though. > > HDMI and eDP: The screen gets distorted for a second. It looks like an old > CRT exposed to a magnet. But only for a second. > > DP: The screen gets black for 1-2 seconds. When enabling the intel iommu, I had to use this option: intel_iommu=igfx_off With intel iommu completely enabled, I had memory errors in dmesg while watching videos. The Intel iommu does not work correctly with some of the embedded intel graphics cards.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>