HDMI display autodetect

[Alexandr Krivulya]

03.12.19 20:59, greg at unrelenting.technology пишет:
> December 3, 2019 8:12 PM, "Johannes Lundberg" <johalun at freebsd.org> wrote:
>
>> On 2019-12-03 01:58, Alexandr Krivulya wrote:
>>
>>> Hi!
>>> When I attach external display over HDMI port on running system it is
>>> not recognized (ThinkPad T470p with CURRENT,
>>> drm-current-kmod,xf86-video-intel). xrandr do not reflect any chnages.
>>> As workaround I need to reboot  or suspend-resume my system.
>> Hi
>>
>> Does it behave the same with the modesetting X driver? (uninstall
>> xf86-video-intel or set Driver = "modesetting" in xorg.conf's device
>> section and restart X or reboot)
>>
>> If so, does it behave the same with drm-devel-kmod instead of
>> drm-current-kmod?
>>
>> You can also see if the kernel driver registers any status status,
>> reports error, etc by increase logging
>>
>> sudo sysctl dev.drm.drm_debug=-1
>>
>> (very verbose so you'd wanna switch this off when done)
>>
>> Check with dmesg for any output when connecting/disconnecting the HDMI
>> cable.
> Also try switching to another virtual terminal (Ctrl-Alt-F<number>) and back.
>
> For some reason I need to do this now..
> (wlroots only refreshes monitors when seeing the udev/devd notification,
> which makes me think that the notification is now delayed somehow)

Yes, its also works. Thanks!