I forgot to write that the dots start to appear only inside "Desktop Environment" (in my case Gnome), not for example in grub/bios. Today I tried to install ubuntu 16.04 and the green dots appeared there too (in Unity).
On Sun, Dec 17, 2017 at 12:50 AM, vychytraly . vychytraly@gmail.com wrote:
Hello friends,
about 2 days ago, unexpected strange green dots started to appear on monitor of my laptop running centos 7.4 with nvidia card. I enclose photo of the problem. Before it was running perfectly fine, I did not do any updates of the system / drivers last few weeks, so I am not sure what can it be related to. When I try to do screenshot. The screenshot captures screen without the dots. But now comes the strange thing: when i am in the running system already and i do "systemctl restart gdm", X restarts and the green dots disappear, everything looks perfect after that.
Please could you give me some advice how can I resolve this problem? I suspect that X could have some problems to properly "indetify" the monitor and therefore it creates this artifacts? Or do you think it could be hardware bug of gpu/monitor?
Thank you very much for any advice Have a nice day
Vych