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I installed Ubuntu 18.04 a day ago. It works perfectly but graphics is a problem; I see screen flickering where there are system or JS overlays and blurred text.

What can I do - my graphics are based on intel chip

Running sudo lshw -c display

I get

*-display                 
   description: VGA compatible controller
   product: HD Graphics 520
   vendor: Intel Corporation
   physical id: 2
   bus info: pci@0000:00:02.0
   version: 07
   width: 64 bits
   clock: 33MHz
   capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
   configuration: driver=i915 latency=0
   resources: irq:127 memory:b0000000-b0ffffff memory:a0000000-afffffff ioport:3000(size=64) memory:c0000-dffff

Check the terminal output screenshot

Elias Gikonyo
  • 41
  • I think you'll need to give some more detailed hardware information here. Graphics devices should come up when you run lspci -knn | grep -EA2 'VGA|3D' or sudo lshw -c display. Can you [edit] your question to add that info? – Zanna May 16 '18 at 07:07
  • Thanks @Zanna , I have edited the question to include the extra details – Elias Gikonyo May 16 '18 at 13:36

1 Answers1

2

To get rid of the flicker, I had to REMOVE these two lines from /etc/environment (you probably don't have them, unless you installed gnome-wobbly-windows extension)

CLUTTER_PAINT=disable-clipped-redraws:disable-culling
CLUTTER_VBLANK=True

And I also had to run sudo ubuntu-drivers autoinstall and then reboot

For nVidia cards: To make the text non-blurry, I just increased the screen resolution via nvidia-settings (the Display dialog did not let me change the resolution)

Jonathan
  • 3,904
  • 1
    Thanks @Jonathan. This worked on my Dell Precision 5510. Symptoms only appeared in Gnome desktop, not XFCE. I had tough time until I found this info. – pauljohn32 Nov 20 '18 at 03:25