Yes there's a problem with the cable or the port here.
Looking at Dell's website they seem to confirm the built-in HDMI port on
the Optiplex 3000 only supports HDMI 1.4, so it can't do 4K60Hz. To get
HDMI 2.0 support on the Optiplex 3000 you need to be using the optional
add-on port which screws
I've updated to the 6.1.0-1004-oem kernel to see if that helped, and it
did not.
Here's the grep:
grep . /sys/class/drm/*/modes
/sys/class/drm/card0-HDMI-A-3/modes:1920x1080
/sys/class/drm/card0-HDMI-A-3/modes:1920x1080
/sys/class/drm/card0-HDMI-A-3/modes:1920x1080
Please confirm that the problem is originating at least as low as the
kernel:
grep . /sys/class/drm/*/modes
There is also evidence in XorgLog.txt that the deprecated 'intel' Xorg
driver was used in the past but your inxi seems to show the correct one
'modesetting' is in use now. Can you
Hi, thanks for the reply. My existing cable claimed to be 4K HDMI 2.0,
but in the interest of troubleshooting, I ordered and received a new
HDMI Cable:
"iBirdie 8K HDMI 2.1 Cable 6 Feet 8K60hz 4K120hz 4K144hz HDCP 2.3 2.2
eARC ARC 48Gbps Ultra High Speed"
This has not resolved the issue. I
The most likely explanation here is that the kernel is not offering 4K
as a supported resolution, which you can check by running:
grep . /sys/class/drm/*/modes
If it's not listed there then you need a higher quality HDMI 2.0 cable.
Or even better to use DisplayPort instead.
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