Graphic glitch when window size is small

[ndtoan96]

What Operating System(s) are you seeing this problem on?

Windows

Which Wayland compositor or X11 Window manager(s) are you using?

No response

WezTerm version

wezterm 20240226-174525-22424c32

Did you try the latest nightly build to see if the issue is better (or worse!) than your current version?

Yes, and I updated the version box above to show the version of the nightly that I tried

Describe the bug

When I open wezterm, there's a glitch at the bottom of the window. But if I resize the window to a bigger size, the glitch goes away.

https://github.com/wez/wezterm/assets/33489972/f072697f-0eb9-445f-adb4-765d2b48cca0

To Reproduce

No response

Configuration

no config

Expected Behavior

No response

Logs

Debug Overlay
wezterm version: 20240226-174525-22424c32 x86_64-pc-windows-msvc
Window Environment: Windows
Lua Version: Lua 5.4
OpenGL: Intel(R) Iris(R) Xe Graphics 4.5.0 - Build 31.0.101.3790
Enter lua statements or expressions and hit Enter.
Press ESC or CTRL-D to exit

Anything else?

No response

[ndtoan96]

Update: Actually, now the glitch is always present regardless of window size. Only full size is ok if I use only one pane, split pane makes the glitch appear.

[akthe-at]

I get this if I have any level of transparency/opacity set. Also on windows with the same Iris Xe Graphics quoted above. I haven't really seen it much since changing away from those settings.

[ndtoan96]

I get this if I have any level of transparency/opacity set. Also on windows with the same Iris Xe Graphics quoted above. I haven't really seen it much since changing away from those settings.

I have the issue on a fresh install with no config too. So, it's not related to transparency.

I have 2 laptops, one is ASUS ExpertBook, another is HP Z Book. Both with Windows 11 and latest wezterm installed. Only the ASUS one having this issue.

[kilbyjmichael]

I have this issue on a Windows laptop with Iris Xe Graphics, but only if I resize Wezterm to be larger than the default window size. After resizing the glitchy pixels do not go away, if I do not resize they never show up. It seems like certain window sizes do not lead to the glitch, but its never consistent and I cannot recreate it.

My current config is set to config.front_end = "Software" but this glitch happens when front_end is set to any of the 3 options.

[oOosys]

I was confronted with a similar issue deep in the past ... it occurred only while running the newest installed game ... I have tested all possible reasons ... replaced the graphic card and the memory ... Finally it turned out that the reason was a problem with the CPU. Replaced the CPU ... and the issue went away. There are rare used CPU commands and if only one software uses them ... you tend to look everywhere excluding the possibility of a broken CPU ...

[Eryx5502]

I'm facing the same issue. When it happens, sometimes restarting wezterm stops the glitches, sometimes no. Also sometimes disabling the transparency of the background solves it.

Did you find any workaround for this issue?

[maronavenue]

Wonder why this happens. This glitch started occurring when I set my background opacity to 0.95. It also happens against an entirely default config (albeit less apparent than 0.95 opacity) when it reaches a certain small window size. It goes away after enlarging it to a particular sweet spot. Never happens on Full Screen.

After switching from Edge back to Wezterm (no resizing was done):

After resizing actively via mouse:

Logs:

Debug Overlay
wezterm version: 20240203-110809-5046fc22 x86_64-pc-windows-msvc
Window Environment: Windows
Lua Version: Lua 5.4
OpenGL: Intel(R) UHD Graphics 4.5.0 - Build 31.0.101.4255
Enter lua statements or expressions and hit Enter.
Press ESC or CTRL-D to exit

[maronavenue]

I have this issue on a Windows laptop with Iris Xe Graphics, but only if I resize Wezterm to be larger than the default window size. After resizing the glitchy pixels do not go away, if I do not resize they never show up. It seems like certain window sizes do not lead to the glitch, but its never consistent and I cannot recreate it.

My current config is set to config.front_end = "Software" but this glitch happens when front_end is set to any of the 3 options.

I found that setting front_end = 'Software' does remove the glitches no matter window size. I'll keep it this way for the time being as it appears to address the glitching.

[ndtoan96]

I have this issue on a Windows laptop with Iris Xe Graphics, but only if I resize Wezterm to be larger than the default window size. After resizing the glitchy pixels do not go away, if I do not resize they never show up. It seems like certain window sizes do not lead to the glitch, but its never consistent and I cannot recreate it. My current config is set to config.front_end = "Software" but this glitch happens when front_end is set to any of the 3 options.

I found that setting front_end = 'Software' does remove the glitches no matter window size. I'll keep it this way for the time being as it appears to address the glitching.

Well, I just try seting front_end = 'WebGpu' and the glitch is gone.

[curiousignite]

I have this issue on a Windows laptop with Iris Xe Graphics, but only if I resize Wezterm to be larger than the default window size. After resizing the glitchy pixels do not go away, if I do not resize they never show up. It seems like certain window sizes do not lead to the glitch, but its never consistent and I cannot recreate it. My current config is set to config.front_end = "Software" but this glitch happens when front_end is set to any of the 3 options.

I found that setting front_end = 'Software' does remove the glitches no matter window size. I'll keep it this way for the time being as it appears to address the glitching.

Well, I just try seting front_end = 'WebGpu' and the glitch is gone.

I had the same issue and this fixed it. Thanks.