drm-next-kmod + Broadwell = console 0.2 Hz refresh
Jakob Alvermark
jakob at alvermark.net
Mon Nov 27 15:16:36 UTC 2017
Hi,
I have been using drm-next-kmod for a while now, and it works fine,
except for this little annoying thing.
On this Lenovo ThinkPad Yoga 12 (i7-5500U) I have
kld_list="/boot/modules/i915kms.ko" in /etc/rc.conf
Shortly after the module is loaded, the console (vt) refreshes only
about every 5 seconds or so.
This only happens on the builtin laptop screen, when I have an external
monitor connected the external monitor is working normally. (Display is
output to both, and the internal screen still has the slow refresh)
Starting X and switching back to vt or quitting X and it is working
normally.
Another thing that might be related; switching windows in X with alt-tab
(xfce) is also slow (on the order of 5 seconds).
I have another laptop I am using drm-next-kmod on (Pentium N3540) which
doesn't show any of this behavior.
Any idea?
Thanks,
Jakob
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