How to disable hot corner

[sonichy]

It is on top level, block click window.
Muffin + LXQt

[rcalixte]

Technically, what you're running isn't supported since it is a Cinnamon setting that may not be supported by LXQt but you can try either of these:

• Launch the settings GUI:

cinnamon-settings hotcorners

• Empty the Hot Corners setting:

gsettings set org.cinnamon hotcorner-layout "['scale:false:0', 'scale:false:0', 'scale:false:0', 'desktop:false:0']"

[sonichy]

cinnamon-settings hotcorners, All is disabled.
gsettings set org.cinnamon hotcorner-layout "['scale:false:0', 'scale:false:0', 'scale:false:0', 'desktop:false:0']" useless.

[cplittlfield]

Or you could simply disable this feature in System Settings > Hot Corners.