Lock screen flashing

I'm having a weird issue with my laptop. If I Ctrl+Alt+L and then shut my laptop screen, upon resuming the lock screen will start flashing/flickering black. If the screen locks due to timing out or if I lock it but don't shut the screen, the lock screen is fine. It only does this if I've shut the lid. I have my power settings set to suspend when I close the lid. So I don't know if it's something to do with power resume or the lock screen. The only difference in behavior is when I close the lid and the system suspends.

Another minor issue is sometimes I'll be browsing the web or doing something and the laptop will just randomly go to the lock screen. I don't know if that has anything to do with it. That's why I'm not sure if it's a power resume or lock screen issue.

I'm using Zorin 15.2 Lite on a ThinkPad x201.

Any help is appreciated, thanks in advance.

Hi, Please be patient and wait for Aravisian, or Zorin Lite specialist!

Since it seems I'm the only one with this problem and no one else knows how to fix, can I replace the lock screen? Would that break anything?

stew1411 wrote:Since it seems I'm the only one with this problem and no one else knows how to fix, can I replace the lock screen? Would that break anything?

Sadly, you are not the only one that has issues with the Lock Screen... Part of it may be due to there being xflock, xscreensaver, power-saver and lightdm all going on at once.
For me, I prefer to get rid of xscreensaver entirely.
Go to your app menu, Settings, Power Management and set all auto-lock settings to "Never".
In a terminal, please enter in the following:

Code:

xset dpms 0 0 0 && xset s noblank  && xset s off

to disable the screensaver.
You may also try setting xcreensaver to zero if the above does not work:

Code:

xset s 0 0

Aravisian wrote:

stew1411 wrote:Since it seems I'm the only one with this problem and no one else knows how to fix, can I replace the lock screen? Would that break anything?

Sadly, you are not the only one that has issues with the Lock Screen... Part of it may be due to there being xflock, xscreensaver, power-saver and lightdm all going on at once.
For me, I prefer to get rid of xscreensaver entirely.
Go to your app menu, Settings, Power Management and set all auto-lock settings to "Never".
In a terminal, please enter in the following:

Code:

xset dpms 0 0 0 && xset s noblank  && xset s off

to disable the screensaver.
You may also try setting xcreensaver to zero if the above does not work:

Code:

xset s 0 0

Thanks. I'll see if it works. Could this problem be part of a larger problem I'm having? If the lockscreen starts flashing, I can't use my fingerprint to unlock. I'll type my password and go about doing something, and the system will go to the lock screen in the middle of what I'm doing. I can use fingerprint like normal and then everything is fine. If the lockscreen doesn't do the flashing thing upon resume, I can use fingerprint and there is no automatic relock. It's almost like the system doesn't know that I unlocked it the first time and is going back to the lock screen. For instance, I was in the middle of typing all that and the system went to lockscreen.

Also, thte only autolock setting I saw was for lock screen when system is going to sleep. I would like to fix this, as I replaced lightdm with slim after my last post and was not impressed with it.

stew1411 wrote:Thanks. I'll see if it works. Could this problem be part of a larger problem I'm having? If the lockscreen starts flashing, I can't use my fingerprint to unlock. I'll type my password and go about doing something, and the system will go to the lock screen in the middle of what I'm doing. I can use fingerprint like normal and then everything is fine. If the lockscreen doesn't do the flashing thing upon resume, I can use fingerprint and there is no automatic relock. It's almost like the system doesn't know that I unlocked it the first time and is going back to the lock screen. For instance, I was in the middle of typing all that and the system went to lockscreen.

Also, thte only autolock setting I saw was for lock screen when system is going to sleep. I would like to fix this, as I replaced lightdm with slim after my last post and was not impressed with it.

I would definitely stick with LightDM over Slim.
The lockscreen you are describing kicking in as it does sounds more like Screensaver than Lockscreen. It is just that the lockscreen then becomes enabled by the screensaver to unlock it.
The post above covers setting the screensaver to Zero or to Off.