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I have lenovo ideapad 310 and I have installed ubuntu 20.04 on it. I have installed nvidia, so according to settings I have: NVIDIA Corporation GM108M [GeForce 920MX] / NVIDIA GeForce 920... as my graphics.

When I want to scroll in browsers it looks wavy. The wavy screen on chrome and chromium is much worse than firefox.

I used this answer and I add that file to /etc/X11/xorg.conf.d directory and the wavy screen disappears. But another problem occurs. Whenever I reboot I see green rectangles. I used this answer to solve the issue but again I have a wavy screen.

How could I solve both problems?

user3741675
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    Could you please provide the driver origin used for u device? – Matthias Lenmher Jan 13 '22 at 14:35
  • I can't understand what you mean exactly but when I run neofetch command I receive this result : GPU: Intel Skylake GT2 [HD Graphics
    GPU: NVIDIA GeForce 920MX In the additional drivers I chose nvidia-driver-470 which is marked as tested for installation.     – user3741675 Jan 13 '22 at 14:57
  • Ok, so you are using nvidia-driver-470, Have you tried with nouveau? – Matthias Lenmher Jan 13 '22 at 15:29
  • I changed to nouveau from Software & Update GUI then rebooted and unfortunately there was no good change. @MatthiasLenmher – user3741675 Jan 13 '22 at 16:20
  • could you provide more than "no good change" info? – Matthias Lenmher Jan 13 '22 at 20:51
  • As i can see, you are under hybrid graphic config... u must have 2 gpu (intel/nvidia), if you have some graphical issues, you considerely change drivers. Also, you are running under IGD or DIS device? – Matthias Lenmher Jan 13 '22 at 20:53
  • I mean after installing nouveau and also other versions like nvidia-driver-418 I have a tearing window. If I open a folder or drag a folder layout or ... the windows is tearing. In firefox if I use the mouse wheel to scroll it is OK, but if I drag the scroll bar then the screen is wavy or tearing. In chrome and chromium it is much worse even scrolling by the mouse wheel is terrible. – user3741675 Jan 13 '22 at 21:13
  • This solution is good and I don't see tearing window while I scroll by mouse wheel on chrome. But it is not perfect I mean If I double click on a folder tearing screen appears again. I read somewhere ubuntu 21 does not have tearing window! – user3741675 Jan 13 '22 at 21:17
  • Thanks for your patience and help but I don't know meaning of DIS and IGD device. – user3741675 Jan 13 '22 at 21:20
  • I am thinking to use bumblebee or not. – user3741675 Jan 14 '22 at 11:09
  • i'm not a "let software's wizard make all magic for me" devote =), i can't suggest something like that. – Matthias Lenmher Jan 15 '22 at 00:06

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Finally I chose intel for graphic card instead of on-demand, nvidia or nouveau and now the problem is solved and I do not have wavy screen. I hope this answer helps someone else.

user3741675
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