Fix flickering display after manually installing an OS - TUXEDO Computers

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Fix flickering display after manually installing an OS

If you install an operating system manually (not through FAI) on your InfinityBook Pro 14 Gen6 (only 3K-Omnia-Variant!), you might experience display flickering afterwards. To fix this, you must add a parameter to the configuration of the boot manager GRUB. 

To achieve this, open the file /etc/default/grub with an editor of your choice. The command to do this with the editor Nano looks like this:

sudo nano /etc/default/grub

Search there in the upper area for the line beginning with 


The parameters in quotation marks may differ depending on the distribution you use, and are not relevant here. Within the quotes and separated by a space, you must now enter the parameter:


This could look something like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet i915.enable_psr=0"
Thereafter, save the change in the editor and close it. Finally, you have to update GRUB by issuing the following command in the terminal:

sudo update-grub

This completes the change, and a reboot should hopefully produce a display without flickering. You can check if the parameter was taken correctly by checking the kernel command line (cmdline) in the terminal:

cat /proc/cmdline

In the output, the parameter should be displayed at the end.