drm-next-kmod + Broadwell = console 0.2 Hz refresh

[Greg V]

On 12/01/2017 15:26, Jakob Alvermark wrote:
> On 11/27/17 15:37, Jakob Alvermark wrote:
>> 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).
> Tested this with scfb, and alt-tabbing is quick.
Hi.

Can you test alt+tabbing with modesetting/glamor?
I'm not sure what Xorg picks up by default, but probably the intel DDX 
which kinda sucks.

xorg.conf:

Section "Device"
     Option "AccelMethod" "glamor"
     Option "DRI" "3"
     Identifier "Card0"
     Driver "modesetting"
     BusID "PCI:0:2:0" # might be different
EndSection