XrandR does not propose 3440x1440 21:9 resolution

[Michel-Ekimia]

XrandR does not propose 3440x1440 21:9 resolution on Ubuntu 20.04 :

How to reproduce :

- Connect on HDMI 1.4 Intel HD 630 mobile a UWUHD 3440x1440 monitor

- Only 16:9 are proposed by xrandR

- XrandR should propose all supported resolutions

WorkAround : manually add the mode

xrandr --newmode "3440x1440_30.00" 196.90 3440 3600 3960 4480 1440 1441 1444 1465 -HSync +Vsync
xrandr --addmode HDMI-2 3440x1440_30.00
xrandr --output HDMI-2 --mode 3440x1440_30.00

[Timo Aaltonen (tjaalton)]

run 'apport-collect 1895301'

[Timo Aaltonen (tjaalton)]

before adding the workaround

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1895301

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Michel-Ekimia (michel.ekimia)]

Client is using 2:1.20.8-2ubuntu2.4 on 20.04

[Marius Gedminas (mgedmin)]

I once had trouble getting full native resolution on an external 2560x1080 monitor. It turned out to be a problem with the DisplayPort -> HDMI monitor cable I had (not enough bandwidth without using a custom reduced frequency mode via xrandr/way harded custom EDID hacks for wayland), and switching to a better cable (DP -> DP, rated for 4K video) allowed me full use of the monitor.

Have you ruled out hardware/cable problems by, e.g. booting to a different OS, or trying a different cable?

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

[Michel-Ekimia (michel.ekimia)]

Could some people confirm this Bug ? It's quite annoying

[Daniel van Vugt (vanvugt)]

I suspect not many people will have a "3440x1440 21:9" monitor to test with.

Please follow the instructions in comment #3.

[Dale Sch. (d2o17o717tds)]

Same issue with my Ultrawide.
Workaround:
xrandr --newmode "2560x999_60.00" 211.75 2560 2720 2984 3408 999 1002 1012 1037 -hsync +vsync
xrandr --addmode Virtual1 2560x999_60.00
xrandr --output Virtual1 --mode 2560x999_60.00

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

[Daniel van Vugt (vanvugt)]

Please follow the instructions in comment #3.

[Michel-Ekimia (michel.ekimia)]

@Dale Sch. (d2o17o717tds) : I don't have this 21:9 monitor right now , could you create a new bug and I'll mark this one as dusplicate , thanks

we need to get rid of this

[Launchpad Janitor (janitor)]

[Expired for xorg-server (Ubuntu) because there has been no activity for 60 days.]

[Michel-Ekimia (michel.ekimia)]

Anyone with a 21:9 monitor could apport this ?

[Daniel van Vugt (vanvugt)]

Anyone with monitor problems should open their own bug, thanks.

[Michel-Ekimia (michel.ekimia)]

Please give a little help here , all my clients have this bug, and no one at canonical can help to confirm it ? That is not serious ?

[Daniel van Vugt (vanvugt)]

We just need one person experiencing the bug to open a bug with the relevant system details automatically attached. That should be done by running:

  ubuntu-bug xorg

or if you really want to reuse this bug then:

  apport-collect 1895301

Sorry, it seems no one at Canonical is affected.

[Sebastian (seb1024)]

I'm experiencing the bug and opened a bug with the relevant system details automatically attached, it's bug 1929456.
Hope this may help.

[Daniel van Vugt (vanvugt)]

Thanks Sebastian. Let's use bug 1929456 for now...

[Michel-Ekimia (michel.ekimia)]

Just tested on a SAMSUNG S34J550WQR on Focal and everything works great in 21:9 OOTB

[Daniel van Vugt (vanvugt)]

Focal has a much newer kernel now, which might help.