Cannnot resume from suspend.

[Alan-Kuan]

Hi, I found that every time after my computer resumed from suspension, the view of my desktop showed up a little while and then the WM just crashed.

Does this have something to do with my display manager or anything else?

[jbuchermn]

I've seen issues like this related to seat management. However it is quite hard to tell.

Can you upload a log file (~/.config/newm_log) after such a crash?

[Alan-Kuan]

Sure, the following is the log it generated. newm_log

[jbuchermn]

Thanks, I've seen the same issue on my machine. Latest pywm commit appears to fix it - can you update and verify?

[Alan-Kuan]

Hello, I tried updating newm with yay. However, when it started to build, I encountered an error and it printed a bunch lines of unformatted error message.

Here is the log of it. error_log.txt

[jbuchermn]

That's a weird error unrelated to the latest commit. It looks like pywm and / or wlroots are not checked out properly. You are on master I assume?

In any case, can you try clean-building with yay?

[Alan-Kuan]

May I ask you which branches of newm and pywm should I use to build and install?

I tried checkout to debug of both; although newm was successfully installed, it could not get started.

BTW, I tried clean-building with yay, but I still encountered previous error.

[jbuchermn]

Can you try with master? The fix is on master.

We can try and solve install issues later - btw, debug is no longer in use. You should be able to use v0.3 branches on both news and pywm as well, although care needs to be taken that wlroots submodule is checked out correctly.

[Alan-Kuan]

Oh, I see. However, I couldn't build pywm on master. The followings is the steps I used to build:

git clone https://github.com/jbuchermn/pywm && cd pywm
git submodule init
git submodule update
python3 setup.py build

After I executed the last line, the error occurred.

[jbuchermn]

Ah I see now - I accidentally updated the subproject commit in my last commit on master which is obvious bullshit.

So, what you're doing is correct, but master was (I just pushed) broken. Can you try again?

[Alan-Kuan]

I tried and it worked perfectly! Thank you so much.

[Alan-Kuan]

Oops, although I could resume from suspension, there's another problem that caused the WM crashed right after resuming.

After resuming, I exited the terminal I opened before suspension, and then it crashed. I also found that if it resumed with only a terminal, it would not happen. However, if it resumed with a terminal and Firefox, the problem would occur.

Here is the log. I take the part related to the issue. newm_log.txt

[Alan-Kuan]

I found that the issue is related to the display manager I used.

I encountered it when I used lightdm, but it disappeared if I simply used greetd.

[jbuchermn]

Hey,

it seems, lightdm is doing something weird with the seat, which pywm does not expect, causing the segfault in pywm - probably this is not a big issue to fix.

However, as I'm not running any display manager and I'm not really interested in a login screen which requires the xserver to start, I can't debug that on my machine. (As a matter of fact I did try to get lightdm with newm running on my nixOS but couldn't within 15mins). So I suppose I'm going to follow sway in not officially supporting display managers (https://github.com/swaywm/sway/pull/3634#issuecomment-462779163).

I'll leave this open for now, in case someone is able to find the bug.

[Alan-Kuan]

Hey,

I see. I'll look for other work arounds or perhaps just go with greetd.

Again, thank you for fixing the bug that it could not resume from suspension!

[Pandademic]

@jbuchermn should we close this issue?