I’m evaluating Zorin OS 18.1 as a replacement for a long-term Windows workflow and overall the experience has been surprisingly positive. However, I’ve encountered a recurring issue involving Chrome window management that appears related to compositing, focus, or window stacking behavior.
Problem
Occasionally a Chrome window becomes visually “stuck” between other windows/layers:
the title bar becomes inaccessible
the window cannot be dragged or focused normally
portions of the window appear trapped behind or between UI layers
interaction becomes cumbersome or partially broken
recovery usually requires indirect workarounds such as:
maximizing/minimizing
resizing from borders
switching workspaces
moving the window indirectly
This does not feel like a simple Chrome slowdown or tab overload. It appears more like a compositor/window-management/focus issue.
I also previously experienced a separate full desktop freeze where the graphical session became unresponsive, although the system itself remained alive and accessible via tty3. That made me suspect a possible interaction involving:
Chrome GPU acceleration
Wayland
fractional scaling
mixed-DPI compositing
Current testing
I’m currently testing:
disabling Chrome hardware acceleration
switching from Wayland to X11
System
Zorin OS 18.1
Intel i7-8565U
Intel UHD Graphics 620 (integrated)
16 GB RAM
Display configuration
Dual-monitor setup:
LG 27UL500-W — 4K (primary monitor)
Samsung S27D360H — 1080p (secondary monitor)
Additional details:
fractional scaling enabled
mixed-DPI configuration (4K + 1080p)
Workflow characteristics
very browser-heavy workflow
many Chrome tabs/windows
AI tools, Google Docs, Slack, etc.
long uptime sessions
Aside from these issues, the overall Zorin experience has actually been very good.
Quick tip: If you get freezing again, instead of jumping to TTY3, try restarting just the GNOME shell. Since you're on X11, you can do Alt + F2, type r, and hit Enter.
Disabling graphic acceleration in Chrome an excellent idea. Also, in Chrome, right-click the empty space near the New Tab button, and check "use system title bar and borders. The system will handle it better than Chrome does.
Fractional scaling and Zorin are a work in progress. It works better in Wayland than X11, but that's not saying much. X11 on the other hand scales the entire screen globally. If you set 125%, it tells the apps to render larger. Problem is some older apps can't handle it. And when it comes to MULTI monitor setups, X11 cannot handle different scaling factors on different monitors. Your best bet is to stay with "integer" settings: 100% or 200%.
Check your refresh rates between the two monitors. They should be the same.
X11 will try to sync them anyway, sometimes not so successfully, to the lowest speed. It will "tear" and hang the compositor if the two monitors get out of sync. To eliminate that struggle, try setting both monitors to 60Hz in Zorin Display Settings to see if the stability improves.
Does your hardware setup involve an Nvidia card, or are you running on integrated graphics?