This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1890418
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1890418
Title:
i915 does not expose vendor-specific extended HDMI timings/modes
Status in linux package in Ubuntu:
Incomplete
Status in xorg-server 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
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