Created attachment 115142 [details]
On my shiny new Thinkpad X250, when the X server is terminated on the intel
driver, the display becomes completely unstable (video just all messed up,
looks like complete loss of both horizontal and vertical sync). Starting the
X server again does not correct the issue; the display remains messed up until
reboot. The final line in the kernel log seems relevant:
[ 90.454275] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
To reproduce, I just do startx, then press ctrl+alt+bksp. Happens every time.
The modesetting driver does not have this problem.
X server 1.17.1
Created attachment 115143 [details]
Forgot to mention... the issue also occurs with the last release of xf86-video-intel 2.99.917
*** This bug has been marked as a duplicate of bug 85583 ***