I see the same issue on 17.04 running kernel 4.10.0-21 Firefox seems perfectly stable, but running other apps like Gnome- Terminal, VLC and others I see black boxes, flashes and bars across the screen. Often they come and go in a flash, but sometimes the whole screen goes and the laptop shuts down (not gracefully - nothing in the logs, seems like a sudden power cut).
dmesg shows a message about under run each time the graphical glitches are seen: "[10126.284724] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [28144.138412] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [55259.892080] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [68189.763709] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [68998.747340] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun " I am happy to troubleshoot this, please someone make suggestions!! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1550779 Title: [i915]] *ERROR* CPU pipe A FIFO underrun - Xorg glitches To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1550779/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
