If the same fundamental issue persists in Wayland sessions then it
sounds like a hardware limitation or a kernel problem. To help identify
which, the Mutter developers might have some suggestions so please
report the issue here:
https://gitlab.gnome.org/GNOME/mutter/issues
** Changed in: mutter
It is super snappy but doesn't work any better: one of the external
monitors, or the other but not both.
I'm unfamiliar with Wayland, and Googling around has not found any
equivalent tools to xrandr to let me interrogate what the system thinks
is going on, so I've included a screenshot of the disp
** Also affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1886729
Titl
Thanks for pointing that out. I was wondering why so many
adapters/cables for sale only mention "USB" while also claiming to do
4K60Hz...
https://www.displayport.org/displayport-over-usb-c/
So Thunderbolt isn't required, only USB 3.1 Alternate Mode and a
powerful (probably only *integrated*) GP
Thank you for the response. I think these might fall into the third
category of 'VESA is its own special story' ?
I bought both the adapters from the dell configurator at the time I
bought the machine.
This is the part that flakes:
https://www.dell.com/en-us/shop/accessories/apd/470-acfc
The oth
Hmm, it seems Thunderbolt-DisplayPort cables are pretty rare. Instead of
searching for those I suggest looking for adapters that are explicitly
for "Thunderbolt" and not "USB".
USB 3.0 has a bandwidth of 5 Gbps
USB 3.1 has a bandwidth of 10 Gbps
4K at 60Hz however requires 3840x2160x4 (33177600)
You certainly seem to have the latest and greatest Intel GPU which
should support 4K up to 120Hz:
https://ark.intel.com/content/www/us/en/ark/products/196597/intel-
core-i7-1065g7-processor-8m-cache-up-to-3-90-ghz.html
So I suspect using "adapters" is the main issue. If you can then please
try
IIRC, upstream GNOME/mutter has done some fixes for dual-link displays
recently but upstream mostly only care about Wayland. So you might have
more luck using 'Ubuntu on Wayland'.
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