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stanley avatar Ubuntu

Ubuntu boots to flickering screen with white noise on primary monitor but only with specific Linux kernels - advice on how to fix?

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stanley

I have Ubuntu 20.04 installed on a dual boot laptop with Windows 10. There is an external monitor plugged into the HDMI port. I booted to Ubuntu with Linux kernel 5.13.0.27-generic and it booted correctly until the login screen, where the laptop monitor flashed black and white with white noise, the external monitor showed a purple background.

I rebooted and chose the 5.13.0.25-generic kernel from the GRUB menu. The first time it booted without issues and I logged in. The second time it did the flickering screen and has done on all subsequent attempts to boot up with this kernel.

I rebooted and used the 5.11.0.46-generic kernel option from the GRUB and this works consistently. Using this kernel I tried changing the video card driver from Nvidia driver 470 to Nvidia driver 495 then Nvidia driver 460. Neither of these fixed the issue.

My system's specs are:

  • ASUS laptop
  • Processor: AMD® Ryzen 7 4800h
  • 16 GB RAM
  • Video card: NVIDIA Corporation TU116M [GeForce GTX 1660 Ti Mobile] / GeForce
  • Ubuntu 20.04.3 LTS
  • GNOME version 3.36.8

Windows 10 boots fine and I can use Ubuntu with the 5.11.0.46 kernel. Prior to this happening, the last time I booted into Ubuntu the only change I made to the system was installing Nemo through Ubuntu Software, which I have now uninstalled.

Any advice on how to fix would be greatly appreciated before I try a fresh re-install of Ubuntu. Thanks.

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Max Vorobjev
I have same issue too on Asus Zephyrus G14, booting back to 5.11 resolves issue.
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KDiE

I had the same problem and the solution to use switchblade graphics mode is to go back to kernel 5.11.0.46 (somehow). If you have a BIOS switch for it, you can select discrete graphics mode. Also, maybe try to connect your laptop with an external monitor.

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