2

Installed Ubuntu 16.04 in Parallels 11 on Macbook Pro Retina.

If during the installation I select "Try Ubuntu Without Installing" the display resolution is fine and xrandr shows resolutions of 640x480 up to 1920x1200 - it selects 1920x1200 - looks ok.

From this desktop I then select "Install Ubuntu 16.04.1 LTS" and proceed with the install. It installs fine.

After re-launching the display is now stuck at 800x600. xrandr says Failed to get size of gamma for output default. And the only resolution it shows is 800x600 - too low.

When I launched Additional Drivers it found 1 unknown one but said it was not working. Did not find an Nvidia driver.

The computer uses an Nvidia GEForce GT 650M chip.

Any suggestions? I know there are other similar posts but am stumped.

Thanks

cappyshack
  • 61

5 Answers5

4

I used the work-around in

Stuck at 800x600 display resolution Ubuntu 14

This increases the resolution to an acceptable level (2560x1440) by editing /etc/default/grub - changing to GRUB_GFXMODE 2560x1440.

However, I feel that the Nvidia driver is not installed properly so this is just a work-around...

Community
  • 1
cappyshack
  • 61
2

You have to update grub too. After some updates on 16.04 (on Parallels) I've lost my display settings. That helps me:

sudo vim /etc/default/grub
GRUB_GFXMODE=1440x900     # MacBookAir resolution
sudo update-grub
Piotr Gogolin
  • 61
0

Try to disable secure boot, you will get back all resolution of display as before installation of Nvidia driver. As it works

Nitesh Kumar Chaudhary
  • 1
0

You could try switching to proprietary drivers. For example, I have GTX 1650 and for it to work properly I had to install proprietary drivers. Ubuntu allows doing this quite easy:

  1. Search for Additinol Drivers applicaton in Activities search fieldenter image description here

  2. Choose the driver you need and click on Apply Changes enter image description here

prnsml
  • 113
0

What worked for me was switching my Nvidia drivers from 470 to 450 (based on rogergo's comment).

Sam
  • 109