Blur effect not working - multi monitor.

[pallebone]

Hello, I am opening bug as per request.

I have attached 2 screenshots showing an issue relating to setting a sigma value. When it is above 0 then you do not see a background on secondary monitor, at least for me.

Please see 2 screenshots:

Kind regards
Peter

[pallebone]

Not sure if relevant but the desktop background is 9MB in size.

here is picture of background I am using:

EDIT: I tried a different smaller picture and had same issue so guess not.

[aunetx]

Thanks for the issue! This seems weird, the sigma value should not change a lot of things...
In looking glass (alt+f2, then lg), could you give me the output of the following lines?

Main.layoutManager.overviewGroup.get_child_at_index(0)
Main.layoutManager.overviewGroup.get_child_at_index(1)
Main.layoutManager.overviewGroup.get_child_at_index(0).get_effects()[0]
Main.layoutManager.overviewGroup.get_child_at_index(1).get_effects()[0]

And, when you have a non-zero value of sigma, try this and tell me if it makes the background reappear (even with no blur):

Main.layoutManager.overviewGroup.get_child_at_index(1).remove_effect(Main.layoutManager.overviewGroup.get_child_at_index(1).get_effects()[0])

[pallebone]

Hello,

Yes it reappeared immediately when typing that, but without a blur on the second monitor.

I have attached a screenshot with the commands and outputs. Apologies I had not used lg before so ignore the unrelated mistake before realizing how to type the commands you wanted :)

Pete

[pallebone]

Another thing I am thinking that might be related is that I have 2 displays running off my laptop, but the laptop built in display is disabled, as I am just using my laptop with 2 external monitors. Unsure if this is relevant. Essentially the laptop monitor itself is unused but has 2 monitors plugged into it.

[pallebone]

Also I like the purple snow/winter background you have on your example screenshot on the front page, how can I find this and download it?

[pallebone]

Also thanks for your help and interest.

[pallebone]

I have more information. I have noticed if I am on workspace 1 then the blur is working on all monitors on the latest update (not sure if it was before I updated but I updated today then noticed this). If I am on a different workspace like 2, or 3 or 4 then the secondary monitor does not have the blur effect.

[pallebone]

I might have spoken too soon. Sometimes when on the first workspace it does not work, although sometimes it does, so its sometimes working and sometimes not working. Im not sure how to trigger it working and how to trigger it not working at this stage. I dont remember it sometimes working and sometimes not working before I updated.

[aunetx]

This bug sure is weird, the sigma value should not have anything to do with how the background is displayed... What is the resolution of your monitors? And, is it possible for you to test it either with another monitor, or with another resolution or with wayland/xorg? So I make sure this is not a very specific bug, and I know how to reproduce it

Btw, the wallpaper used is one of the default wallpapers in gnome :)

[pallebone]

ok give me a few days I will try do some testing with different setups and find if I can get it to behave differently in any way.

[aunetx]

Ok thanks a lot!

[pallebone]

I did find something quite quickly. If I log out and go into X11, I cannot reproduce the error. In wayland I get the sometimes it works and sometimes it does not problem. I am wondering if you have tested under wayland? Maybe you will have to click the activities button a lot of times to see it happen if you have a super fast machine, mine is a little older.