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rated 0 times [  2] [ 0]  / answers: 1 / hits: 1274  / 2 Years ago, fri, october 28, 2022, 3:28:13

I have a dusty room, so I decided to use compressed air to remove the dust from throughout my computer, including my graphics card. I used the compressed air to clear out my graphics card then put it back in. When I booted, right away I noticed the grub menu looked strange because the font looked 4x larger. (This happens when I have my dvi cable plugged into the wrong dvi port, but it doesn't matter anymore.)



When I tried to boot Ubuntu I would get a purple screen for a long time followed by a black screen... then nothing. After googling around on another computer I found that adding the "nomodeset" parameter to the grub boot options got me through to the log in. I am able to log in and use the computer, but now I have strange artifacting across the top of my screen and by cursor flickers.



I figured I had damaged my graphics card, except I am able to boot into Windows fine and run video games and graphics card tests. An interesting thing to note is the nvidia driver crashed when I started Windows the first time after cleaning, but was fine after that. This is very strange to me, because the bugs seemed like a hardware error. I tried removing the graphics card and placing it back in, but that doesn't seem to help at all.



So far I have tried:




  • Taking gfx card out then back in

  • Updating UEFI

  • Resetting CMOS

  • Booting from thumb drive Ubuntu (same issue)

  • Changing PCI slot of gfx card

  • Cleaning gfx card connectors with alcohol and swab.



I am using a Asrock Z77 Extreme4 motherboard with a Nvidia 670 gtx graphics card. Any help is welcome.



UPDATE:
I bought a nvidia 210 graphics card and swapped it out for my current card. I get the exact same issues with a different nvidia card. I'm not sure if I want to try another brand's card. I am starting to wonder if this could be on the motherboard.



I tried to boot into a Fedora live USB, but get a blank screen, which is what I get on Ubuntu unless I boot with nomodeset.


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 Answers
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I was able to resolve my problem. It turns out the EDID that my monitor was returning was corrupt. I was able to resolve my issue by power cycling my monitor (among other things).



My monitor is the last place I would expect corruptible state!



The steps I took were:




  • Run tool "get-edid". Tool, reported "Call failure" for one of the EDID blocks.

  • Power cycle monitor

  • Run tool "get-edid". No more failures reported, "Call successful" reported for all blocks.

  • Run nvidia-xconfig (now able to detect proper settings)

  • Restart


[#32613] Friday, October 28, 2022, 2 Years  [reply] [flag answer]
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ledeball

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