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Graphical glitches when using hardware rendering #19726
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opened 2026-01-31 06:51:52 +00:00 by claunia
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Reference: starred/terminal#19726
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Originally created by @tanc on GitHub (Apr 18, 2023).
Windows Terminal version
1.17.1023
Windows build number
22H2 22622.608
Other Software
No response
Steps to reproduce
Expected Behavior
Expect that the rendering is the same as software mode where there are no glitches.
Actual Behavior
Glitches appear where the cursor appears to lag or doesn't render the character or multiple characters until another key is pressed.
See video for example:
https://user-images.githubusercontent.com/76320/232841647-65a4e126-b05a-47ab-98d4-2e5069cbfb6d.mp4
@tanc commented on GitHub (Apr 18, 2023):
I've tried changing the font and colour scheme but they all produce the same result. The only way to stop the glitch is software rendering.
@lhecker commented on GitHub (Apr 18, 2023):
You say
but those two use entirely different text renderers by default. Do you have "AtlasEngine" in the "Rendering" settings enabled in Windows Terminal stable (1.16.10262.0)? If so, could you disable that setting? If the issue still happens then, then it's possible your hardware is faulty, because the two text renderers were written independent of each other and have an entirely different architecture.
@tanc commented on GitHub (Apr 19, 2023):
I did have AtlasEngine enabled in both. I've now disabled AtlasEngine in Windows Terminal stable and I'll see if the problem occurs during work today. Current settings in Windows Terminal stable:

The issue only started happening about a week ago and I'm wondering whether it coincided with a graphics card update (NVidia Geforce 2070 Super). I updated the drivers again today with the latest release and can confirm the issue still happens on Windows Terminal preview with AtlasEngine on or off and software rendering off.
@tanc commented on GitHub (Apr 20, 2023):
After a full work day using Windows Terminal stable with AtlasEngine off I can say that I haven't seen the graphical glitch. I'm now trying with AtlasEngine on and after 10 minutes the glitch hasn't appeared.
Using Windows Terminal preview with Atlas Engine at first it all seems good. Then the glitch appears after a short time using the terminal, maybe a minute. Once the glitch appears it stays in that terminal and affects all splits.
@lhecker commented on GitHub (Apr 26, 2023):
Hmm... the version of AtlasEngine in stable and preview is identical. I wonder if it's maybe a compiler bug? (It wouldn't be our first!) Or some other form of race condition? 1.18 will release with an entirely new version of AtlasEngine, so I'm cautiously optimistic that the issue will be resolved as a side effect.
@zadjii-msft commented on GitHub (Apr 26, 2023):
I'll tag this one up as "We think it's fixed in 1.18, and we'll come back to validate"
@Moqume commented on GitHub (May 23, 2023):
As of version 1.18.1421.0, I'm encountering similar glitching when AtlasEngine is enabled.
Block cursor moves as I am typing, but letters are covered entirely by the block. Typing a command, ie
dig microsoft.comdoes not show the output (blank lines) but moves cursor down. Switching windows (Alt Tab) makes all the text appear (both typed and output).Disabling AtlasEngine resolves the issue.
The rest defaults. Intel Arc A370 GPU and Iris Xe (31.0.101.4369, beta-driver opt-out).
@zadjii-msft commented on GitHub (May 23, 2023):
This is most definitely what @lhecker just fixed in #15403. I think we'll have that our for servicing sometime in the next 1-2 weeks
@lhecker commented on GitHub (May 23, 2023):
It 100% is. I'm sorry for causing the issue - We only noticed it mere hours before publishing 1.18. If you can and don't mind, it'd be great if you could use an alternative font just for a week, because it would help us find other potential bugs you might encounter. I personally for instance like using Delugia. Otherwise I hope we'll be able to ship a fix soon!
@Moqume commented on GitHub (May 23, 2023):
Thanks @lhecker - with Delugia and AtlasEngine enabled again, it seems fine. Much appreciated!
@03juan commented on GitHub (May 25, 2023):
If you need any more data points, with AtlasEngine and ClearType on I experience the same glitches, but changing to "Aliased" text everything works fine. (I don't know how relevant that is)
I'm using Terminal Preview v1.18.1421.0, running
zshon Ubuntu 22.04.2 LTS with CaskaydiaCove NF Mono font and the Tango Dark colour scheme.Also, changing the alias mode while the Ubuntu terminal is open results in the error:
@lhecker commented on GitHub (May 25, 2023):
Yeah, that makes sense. The problematic fonts pretty much only clip out of the viewport by 1 pixel, which then triggers #15403. Aliased text is probably just 1px less tall.
Over at #14082 I posted a custom Windows Terminal Preview version yesterday that integrates 3 AtlasEngine bug fixes. You can download it here: blob.hecker.io/sharex/Microsoft.WindowsTerminalPreview_1.18.1443.0_8wekyb3d8bbwe.msixbundle
I'm using my own personal domain because I don't want to expose my internal work addresses. However, the file is properly cryptographically signed by Microsoft. You can try it out if you'd like! I'm pretty confident that it fixes the MesloLGM NF bug and similar.
@03juan commented on GitHub (May 25, 2023):
Awesome yes, can confirm that fixed it! 👍
Thanks for the info about CaskaydiaCove having issues. Will try out the other font recommendations.
@jx commented on GitHub (May 30, 2023):
I'm also having an issue when using hardware rendering, all text will either render black or as lines about 35% of the time. It'll all render as vertical pipe characters, then sometimes a reflow/refresh will fix it, or typing CLEAR in Ubuntu. NVidia latest drivers, 3080Ti, Win10, happy to help trouble shoot. It stops when disabling hardware rendering.
@lhecker commented on GitHub (May 30, 2023):
@jx Does the issue reproduce on Windows Terminal Preview v1.18.1462.0?
If it does, could you please try to describe any steps I would have to take to reproduce it on my machine if I were to start from a clean state? I mean things like your font family, font size, what shell you use, an application or some text string that reproduces the issue, etc. Anything you think is necessary to reproduce it basically. That way I could run it under a debugger to see what’s going on. 🙂
@jx commented on GitHub (Jun 21, 2023):
@lhecker I rolled back my video drivers and can't reproduce this at all. Sorry it took me three weeks! But I can't repro it at all now, so I think there was a problem with the nVidia drivers.
I had to roll them back for another reason: one of my monitors kept cutting out and after I swapped the cable and verified nothing was loose, I rolled back the gfx driver. All the issues went away. I'm on 532.03 GR, not Studio drivers. What else would you like me to test?
@lhecker commented on GitHub (Jun 21, 2023):
Wait wait wait…
You also have this issue where your monitor signal is cutting out? I started getting this issue suddenly last week and it weakly correlates with a Nvidia graphics driver update. That’s interesting! I guess I’ll also have to try and downgrade it.
If you’d like to test anything, please let me know if you find any unusual rendering issues in Windows Terminal Preview 1.18, for instance anything like what OP reported.
@jx commented on GitHub (Jun 21, 2023):
Yes! It all started around the same time but the cutting out of the display was rare and just got worse over a couple of days. Once I rolled back all was golden. Everything works on this version I mentioned including preview. I only run preview builds.
@zadjii-msft commented on GitHub (Jul 5, 2023):
Hokay so it sounds like the issue @jx was having was related to some nvidia drivers. Otherwise, we're pretty sure this should be fixed on the latest 1.18 build, https://github.com/microsoft/terminal/releases/tag/v1.18.1462.0. @tanc you want to give that build a try to confirm/?
@jx commented on GitHub (Jul 5, 2023):
I'm currently on 1.18.1462.0 presently, no issues here. Hopefully the same is true for @tanc !
@tanc commented on GitHub (Jul 6, 2023):
Unfortunately on
1.18.1462.0I'm still seeing graphical glitches:https://github.com/microsoft/terminal/assets/76320/6377dec6-86de-4924-88fa-a57c9a50b35a
Whilst on the stable version I have no issues.
@lhecker commented on GitHub (Jul 7, 2023):
@tanc Can you try this for me? Save this as
passthrough.hlsl(or similar):Then open your
settings.jsonand add that file as your shader like so:Afterwards restart Windows Terminal (just to be sure). Does it still reproduce then?
Additionally, do you think you could produce some instructions for me how I can reproduce your WSL setup and shell exactly?
@tanc commented on GitHub (Jul 7, 2023):
I've just left for holiday for three weeks so I can't test as this only happens on my desktop machine. When I get back I'll test and try to put together as much as I can as repro steps
@tanc commented on GitHub (Jul 27, 2023):
@lhecker I've just got back and I've added the
passthrough.hlslto mysettings.jsonand can confirm the glitch no longer presents itself. Commenting out theexperimental.pixelShaderPathline and savingsettings.jsonre-activates the display glitch.