I don’t know why, but it started working today again. To rule out a hardware failiure the BIOS option to use the HDMI as boot display is good. And this morning it just worked again?!?! I guess because I brought tho older brother Lenovo X1… > On Jun 25, 2019, at 22:08, Florian Wehner <florian@xxxxxxx> wrote: > > Thanks so far! Last two mails collected here. > > First guess: hardware failure? > >> Does the display work at startup? Like does it POST and do you have a boot >> loader? > > Not on the external screen. That was what I expected for the UEFI setting “Post on hdmi”. > > That could lead to failed port? > >> Do you have another device that you could use to check that the cable and monitor are not the issue? > > Yes. Tested a TV, and a projector. > >> What graphics card are you using and >> which driver? > > Whatever is installed by default through pacstrap base > >> Awhile ago I believe xf86 video intel was deprecated in favor of mode >> setting. > > Thanks for pointing that out. I saw that here: https://wiki.archlinux.org/index.php/Intel_graphics#Installation > >> Are you using UEFI? > > Yes. Only. Systems Boot > >> On Jun 25, 2019, at 20:03, Ralf Mardorf via arch-general <arch-general@xxxxxxxxxxxxx> wrote: >> >>> On Tue, 25 Jun 2019 19:07:56 -0400, Florian Wehner wrote: >>> I wasn’t able to get my HDMI output running on my Lenovo X1 Carbon 6th >>> gen today. I run gnome on Wayland. It has been working fine for the >>> last few days but completely dead today. >> >> Did an update affect anything? > > Might be. Mesa just got an minor update a few days ago. But I rebooted successfully at least once after updating. > >> I'm using >> Driver "intel" > > Where can I find this info? > >> However, the "Multihead" Wiki, >> https://wiki.archlinux.org/index.php/Multihead, refers to "Related >> articles" for non-Intel. >> >>> Symptom: The external display detects that an HDMI cable is connected >>> (via ground?) but there is no signal. >> >> Maybe no signal, but perhaps just +5 V, >> https://en.wikipedia.org/wiki/HDMI. >> >>> Here’s what I tried: >>> Switch from wayland to Xorg >>> [snip] >>> Looking at xrandr => Not connected >> >> But xrandr shows one or more disconnected HDMI ports? > > Yes. 2 disconnected HDMI ports shown. One cloned with a DP. > > —Flo
