18.04 stuck on 640x480

[michael123]

Hello, I have 2x 1920x1080 monitors attached to a SIIG docking station

http://www.siig.com/it-products/note...ion-usb-c.html

Under 16.04, they worked great with ubuntu GNOME.

I just installed Ubuntu 18.04 and the monitors are stuck in 640x480 mode. It's a System76 linux laptop (Kudu)

00:02.0 VGA compatible controller: Intel Corporation Device 591b (rev 04)

I tried these suggestions, but didn't get anywhere:

https://support.displaylink.com/know...ent-x-upgrades

I also tried adding the modes directly with xrandr in a .xprofile, but didn't get anywhere with that either. xrandr thought they were in 1920x1080, but the monitors still showed 640x480.

Has anyone gotten this to work?

Thanks!

[He'emin]

Hello,

I also had only issues with Ubuntu in Gnome. Whenever I had the docking station connected I could not even login. Xorg would right away crash and push me back to the login screen.
So I tired Kubuntu and it worked, even thought the mouse flickering is worse.

He'emin

[michael123]

Ubuntu 18.04 LTS includes X and Gnome now, so I'm sure DisplayLink intends to support it, instead of Kubuntu. Logging in works fine, and there's no mouse flickering.

Here's a link to the output of the support tool:

https://drive.google.com/file/d/1Q6R...ew?usp=sharing

Why are the monitors only showing 640x480 in "Displays" and xrandr?

Thanks!

[smacdonald-miov]

I just upgraded from Ubuntu 14.04 to 18.04 and am also awaiting DisplayLink 18.04 support.

[Sparxy]

This worked for me:

gtf 1920 1080 60
xrandr --newmode "1920x1080_60.00"  172.80  1920 2040 2248 2576  1080 1081 1084 1118  -HSync +Vsync
xrandr --addmode DVI-I-1-1 "1920x1080_60.00"
xrandr --output DVI-I-1-1 --mode "1920x1080_60.00"

Use the output from gtf (after Modeline) in xrandr --newmode
Replace DVI-I-1-1 with your xrandr DisplayLink output.

[michael123]

Originally Posted by Sparxy

This worked for me:

gtf 1920 1080 60
xrandr --newmode "1920x1080_60.00"  172.80  1920 2040 2248 2576  1080 1081 1084 1118  -HSync +Vsync
xrandr --addmode DVI-I-1-1 "1920x1080_60.00"
xrandr --output DVI-I-1-1 --mode "1920x1080_60.00"

Use the output from gtf (after Modeline) in xrandr --newmode
Replace DVI-I-1-1 with your xrandr DisplayLink output.

Hi Sparxy, hmmm... that didn't work.

It creates a new mode, shows the resolution in the Display settings, and appears to create a 1920x1080 buffer in Gnome.

But the DisplayLink is still showing a clipped 640x480 display of the center of that larger buffer. The monitor is still 640x480.