window list is collapsed on secondary monitor

[lubomirfiala]

Window list is collapsed on secondary monitor and doesn't show any content. See photo.

It happens only on secondary monitor, i tried to tweak some random appearance settings and it happens only in Titles view, only after alt tab was once used on primary monitor. No other settings seems to interfere with this.

Sorry for photo, but i cannot take screenshot when alt tab is active.

my other preferences looks like this:

Edit: thank you for this view option, it's much better than tiles or icons :)

[lwouis]

Hi,

Thank you for sharing this issue.

Could you please share the resolutions of your 2 monitors? Maybe a picture of how AltTab looks on the other monitor, as well?

Thank you 🙇

[emanueldima]

Main display, 1496x967 scaled resolution (MacBook Pro 16-inch, 2021)

Secondary display, 3200x1800 scaled resolution (4K native)

It only happens when using the "Titles" appearance style, afaik.

[lwouis]

I wonder if this could be due to the display of this macbook having a notch? Maybe grabbing the dimensions of such a display creates the issue?

#3751 seems to happen also on the main macbook displays. Debug Profile says that it's a Mac14,2 which seems to be a macbook air with the notch.

[emanueldima]

I tested some more and I see this reproduces when there is a big difference between the secondary screen resolution and the main screen resolution. E.g. it

• reproduces at 3200x1800 (secondary) and 1728x1117 (main)
• does not reproduce at 3200x1800 (secondary) and 2056x1392 (main)
• reproduces at 2560x1440 (secondary) and 1496x967 (main)
• does not reproduce at 2560x1440 (secondary) and 1728x1117 (main)

It also only reproduces on the laptop screen, not on the secondary display, even when I set a high resolution on main and a low resolution on secondary.

[zawadzkipiter]

same here, also only bug appears on laptop screen - when secondary is big 4k screen.

[lwouis]

@zawadzkipiter is your laptop screen having a notch at the top?

@emanueldima

reproduces at 3200x1800 (secondary) and 1728x1117 (main)

In that situation, do you reproduce the issue if the secondary monitor is not connected? I mean, is this issue about the 2 monitors, or does it happen already with 1 monitor, with specific resolutions?

Thank you 🙇

[emanueldima]

No, the secondary monitor must be connected for the bug to show up. I also tried changing the display arrangements (i.e. which monitor is to the left of the other one or one on top of another) but this does not seem to matter.

Another interesting thing is that if I change the resolution of the primary display the titles are rendered correctly until I switch to the other display. Once the titles are rendered on the secondary display they will not be rendered correctly on the primary one anymore (but this is what @lubomirfiala already said).

[zawadzkipiter]

Yes, notch. Mbp 14 2024 W dniu czw., 24.10.2024 o 18:12 lwouis ***@***.***> napisał(a):

…

@zawadzkipiter <https://github.com/zawadzkipiter> is your laptop screen having a notch at the top? @emanueldima <https://github.com/emanueldima> reproduces at 3200x1800 (secondary) and 1728x1117 (main) In that situation, do you reproduce the issue if the secondary monitor is not connected? I mean, is this issue about the 2 monitors, or does it happen already with 1 monitor, with specific resolutions? Thank you 🙇 — Reply to this email directly, view it on GitHub <#3744 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABCXIUAYJZUAP74N4S4RU3LZ5EL7DAVCNFSM6AAAAABQJ27A3WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIMZVG4YDQMZXHE> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[lubomirfiala]

I tried all 4 common setups for me and i can reproduce this bug on all of them:

external 5120x1440 primary & mbp 1512x982 (scaled) secondary
external 5120x1440 primary & mbp 1800x1169 (native) secondary
mbp 1512x982 (scaled) primary & external 5120x1440 secondary
mbp 1800x1169 (native) primary & external 5120x1440 secondary

Then i tried to change resolution on my external monitor to some funky values. First i thought it was related to screen ratio, but now it seems it only happens above 3400px of width of screen. Problem is, that is not consistent with @emanueldima :

can reproduce it:

external 3440x1440 & mbp 1800x1169
external 3440x1080 & mbp 1800x1169
external 3840x2160 & mbp 1800x1169

cannot reproduce it:

external 1920x1080 & mbp 1800x1169
external 2560x1440 & mbp 1800x1169
external 1280x1024 & mbp 1800x1169
external 1920x540 & mbp 1800x1169

Yes my mbp has a notch and it only happens on mbp screen only.

[zawadzkipiter]

@zawadzkipiter is your laptop screen having a notch at the top?

@emanueldima

reproduces at 3200x1800 (secondary) and 1728x1117 (main)

In that situation, do you reproduce the issue if the secondary monitor is not connected? I mean, is this issue about the 2 monitors, or does it happen already with 1 monitor, with specific resolutions?

Thank you 🙇

yes, notch

[emanueldima]

I notice some similar weird behaviour with other programs too (e.g. raycast when using the windows management features). This may well be a macos bug, where the screen dimension is incorrectly reported in some conditions. The question is if there is a simple workaround for the problem. For instance the alt-tab works well until it renders on the secondary monitor, so it may work to cache the first screen resolution and to use this value when the macos reported resolution is too small.

[lwouis]

Hi,

Here is a local build with special logs. Could you please run it from Terminal.app, and share here the logs you get?

You should see logs when you hit the AltTab shortcut. It should print the screens and their resolution.

This should helps us settle if its a macOS bug or an AltTab bug.

Thank you 🙇

[emanueldima]

Unfortunately the newest macos version does not allow me to run it: Apple could not verify “AltTab.app” is free of malware that may harm your Mac or compromise your privacy. Is there a way to compile it from source with the logs? It will run if I compile it on the same machine.

[lwouis]

@emanueldima you can open the app by following these steps 👍

[emanueldima]

Apologies for the delay. You're right of course about starting the application. I ran it like this:

• start and test on the secondary monitor: window displays correctly
• switch mouse to primary (laptop) monitor, show the switcher: window displays correctly
• switch mouse on secondary monitor, show the switcher: window displays correctly
• switch mouse on the primary (laptop) monitor: window displays incorrectly

alttab-issue.log

[lwouis]

Thank you @emanueldima

From the logs, I see 2 things:

• Screen resolutions seem to have reasonable values. No (0, 0) for instance
• Screen resolutions don't change over time

This seems to indicate a problem in AltTab layout logic, versus an issue with macOS support of the screen, or some notch issue.

You mentionned previously:

reproduces at 3200x1800 (secondary) and 1728x1117 (main)
does not reproduce at 3200x1800 (secondary) and 2056x1392 (main)
reproduces at 2560x1440 (secondary) and 1496x967 (main)
does not reproduce at 2560x1440 (secondary) and 1728x1117 (main)

In the logs, I see the following screens:

• 6030EF86-73F3-79BA-0857-D6964E3302DB (0.0, 0.0, 3008.0, 1692.0)
• 37D8832A-2D66-02CA-B9F7-8F30A301B230 (3008.0, 412.0, 1440.0, 900.0)

These resolutions of 3008x1692 and 1440x900 were not mentionned before. How come they differ from previous resolutions discussed?

Thank you 🙇

[emanueldima]

@lwouis I tested the AltTab with logs on a macbook air M1, which supports different resolutions for the secondary screen (I was not aware of that). The previous tests were made, I think I mentioned, on a Macbook Pro m1 16"

[lwouis]

#3816 Maybe related?