filter window ?

[wade-fs]

I found some app, such as firefox, will create multi-window in alt-tab list, but cannot switch to it. I guess those windows without available window id. Could weed out that?

[sagb]

Try to guess what's special with that non-focusable windows. You can run alttab -v from terminal, try to switch to problem window and look for correspondent changing focus to <id> line in alttab output. Then examine that window: xprop -id <id>

Also, what WM are you using and how alttab recognizes it? alttab -v 2>&1 | grep WM

[sw882882]

for those who searched and are still having this issue, messing around with the -w option fixed it for me, whether this is intended or not I am not sure.

[sagb]

To say something meaninfull, I asked for diagnostics from those who can reproduce this bug. Here is even more detailed step-by-step procedure:

1. Kill alttab if it's running (killall alttab)
2. Start alttab from within terminal emulator with -v option. It will print diagnostics to standard output during run.
3. Try to switch to "non-selectable" window with alttab (let it fail).
4. Switch to terminal where alttab is printing (without using alttab! Probably using mouse).
5. Look for the following lines in diagnostic output: changing focus to .... Window id will be mentioned here (0x12345...)
6. Either kill alttab (ctrl-c) or start another terminal session, and run: xprop -id 0x12345, where 0x12345 is obtained in previous step. Show the output in this github issue.
7. Also, show the output of alttab -v 2>&1 | grep WM and what WM are you actually running.