my monitor detected as unknown and can't change resolution 18.04 LTS

[Person_125]

so, I was just rebooting the system then when it booted I found that the resolution has changed to 1024x768 (4:3) and the default resolution of my monitor is 1600x900 (16:9) and I can't change the resolution at all, and whenever I use the xrandr command it gives me the Failed to get size of gamma for output default message, what can I do to fix this

 

btw I have a GTX 1050Ti with 430 driver installed

 

EDIT: I solved by installing the nvidia driver I installed earlier

[Sauron]

Have you tried rebooting again? Did you install any updates before rebooting?

[Person_125]

2 minutes ago, Sauron said:

Have you tried rebooting again? Did you install any updates before rebooting?

Yeah I rebooted like 5 times, and I installed a whole lot of stuff before rebooting cause I just had Ubuntu installed, and I updated Ubuntu before rebooting

[Sauron]

11 hours ago, Person_125 said:

I installed a whole lot of stuff before rebooting cause I just had Ubuntu installed, and I updated Ubuntu before rebooting

That's probably what caused your problem. Try reinstalling your gpu driver.

[Person_125]

7 hours ago, Sauron said:

That's probably what caused your problem. Try reinstalling your gpu driver.

That's what I did and it got fixed, and thanks for replying.

[Sauron]

3 minutes ago, Person_125 said:

That's what I did and it got fixed, and thanks for replying.

You should mark the thread as solved