I can't get the NUC to connect via HDMI to a 2560x1440-75hz monitor Lenovo q27q-10 with Linux.
During startup or in GRUB a picture is displayed. The GDM login screen is displayed for a fraction of a second, then the screen turns black. Even if I switch to a console via ctrl+alt+F2 I don't get any signal from the screen anymore.
- On another screen the connection works immediately - with 4K@60hz
- The screen supports 75hz and I can easily connect at 2560x1440-75hz with the same HDMI cable via a Thinkpad T460p using Linux.
- Over 2 live Linux systems (Manjaro and current Ubuntu LTS) there is also no picture.
- I have already tested an older Linux 4.19 kernel version without success.
- Also under Windows 10 I get without problems a 2560x1440-75hz resolution with the same hardware.
- The bios and HDMI firmware on the NUC is up to date. I have already tried 3 different HDMI cables.
So I think it is a problem especially with this monitor and this NUC under Linux. Something seems to go wrong when negotiating the resolution or refresh rate.
If I manually set the refresh rate with xrandr to 60hz it works:
xrandr --output DP1 --mode 2560x1440 --rate 60
Unfortunately a bad workaround, because I can't enter it before the start and I would like to have the 75hz refresh rate.
Maybe you have some advice for me?
Thank you for posting in the Intel Community and for completing the testing that you have done.
Based on the troubleshooting that you have performed the display, cable, Intel® NUC, and Windows® 10 allows you to have the resolution of 2560x1440 @75hz, I would be important making sure that you have the proper Linux drivers (you can confirm that with the Linux community), you can also try our intel open-source (https://01.org/search/node).
Intel Customer Support Technician