Public bug reported:
I have a Toshiba radius 11 laptop which has a 4 k native screen. I have
connected an Asus PB287Q 28" external monitor (https://www.asus.com/us
/Commercial-Monitors/PB287Q/specifications/) over HDMI which displays
the full 4K resolution when running under windows10 but will only reach
a maximum resolution of 1920x1080 under ubuntu 20.04, same hardware just
dual booting. Under Monitor Preferences this monitor is detected as an
"Ancor Communications inc 28" and the monitor preferences provides a
number of resolution steps up to 1920. If I issue "xrandr --addmode
HDMI-1 3840x2160" this resolution is added to the monitor preferences
pick list but attempting to apply it results in "the selected
configuration for displays could not ..." message
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1890418
Title:
External monitor will not display to 4k
Status in mutter package in Ubuntu:
New
Bug description:
I have a Toshiba radius 11 laptop which has a 4 k native screen. I
have connected an Asus PB287Q 28" external monitor
(https://www.asus.com/us/Commercial-Monitors/PB287Q/specifications/)
over HDMI which displays the full 4K resolution when running under
windows10 but will only reach a maximum resolution of 1920x1080 under
ubuntu 20.04, same hardware just dual booting. Under Monitor
Preferences this monitor is detected as an "Ancor Communications inc
28" and the monitor preferences provides a number of resolution steps
up to 1920. If I issue "xrandr --addmode HDMI-1 3840x2160" this
resolution is added to the monitor preferences pick list but
attempting to apply it results in "the selected configuration for
displays could not ..." message
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890418/+subscriptions
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