Hello, I have installed a brand new HP EliteBook 820 G2 with Debian Stretch, which includes the Xorg server version 1.17.2 and the Intel driver 2.99.917. At boot, the Linux console is fine. Then I start Xorg, and when I get back to the console (either through quitting Xorg or ctrl-alt-f2), the console output comes back, but the horizontal synchronization seems to be nonfunctional: the output keeps scrolling horizontally. I can type text, run commands, etc. so it's really just the output which is buggy. One very odd thing is that if I consume CPU (e.g. through while true ; do : ; done), the display becomes perfectly stable and the console is usable again. This doesn't depend on the CPU which I run that on. I guess this may be related with CPU sleep modes. Downgrading the Xorg server to 1.16.4 and the intel driver to 2.21.15 fixes the issue, I'll probably try to bisect a bit (at least try to use the same Xorg server) This is basically making my laptop unusable for my work without a downgrade :)
'Tis a kernel bug, update your kernel or use i915.enable_ips in the meantime.
Indeed, enable_ips=0 or upgrading to linux 4.2 rc8 instead of just 4.1.3 fixes the issue
Closing old verified.
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