Ubuntu
linux package

  1. Bug #1727662
  2. Comment #40

Comment 40 for bug 1727662

Revision history for this message
Angelo Lisco (angystardust-gmail) wrote : Re: [Lenovo ThinkPad T450s] Issues after docking and locking: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

Hi Alexander. Thanks for your bug report and all your effort to troubleshoot and fix this weird issue.
I'm not using any docking station but I'm experiencing the same behaviour (screen flickering and unable to lock my screen) here on a Lenovo T450s with a Intel HD Graphics 5500 (Broadwell GT2) GPU.
It happens both with Ubuntu 17.10 and Fedora (26 and 27) so i'm so I suppose that's a weird bug in the intel driver.
Did you find any workaround or fix?