Re: [lubuntu-users] Desktop crashing (18.04)?

[Mark F]

After I posted that last update, I was thinking how GIMP hasn't crashed
since I started stracing pcmanfm. It would previously crash *a lot*. Much
more frequently than the typical *days* between pcmanfm crashes. That
seemed to confirm my suggestive mind that strace is throttling things and
preventing a timing problem.

However, I haven't use GIMP as much lately. So, I just took a picture (I'm
fostering a dog and was overdue for a new photo).

The first thing I noticed using GIMP (2.10.8): the strace log was going
absolutely wild. I'm stracing pcmanfm. Usually it stops emitting when I
switch to an application. (I haven't tried a lot of apps. But, I thought I
saw that when switching to my chrome browser. The log went dormant.). But,
with GIMP, constant log activity (but I'm not stracing it).

So, that confirmed to me stracing is slowing GIMP down and it wasn't
hitting the "timing problem" I've been imaging about all this (clicking too
fast, or something).

Alas... GIMP finally did crash. It didn't freeze (which it used to do). It
just disappeared. It's been disappearing. I haven't paid attention to
whether freezing stopped, or when freezing and disappearing have both been
occurring. (Come to think of it, I think pcmanfm has disappeared too -- in
addition to, or replacing the freezing behavior. I stopped paying attention
and it was all the same thing to me.).

So, I have strace-pcmanfm output when GIMP crashed. Maybe someone would
like to ponder that? I tailed the last 500k (60mb) lines to a new file.
That's 21 seconds worth before I ctrl-breaked out of strace (which I did
within 3-5 seconds of GIMP crashing). Remember, the console (stderr) was
being captured too. (I don't think I could differentiate that output if I
saw it in there.).

If there's a place I could upload that, let me know. (I can post it to the
bug report. I was thinking this is kind of different and related more to my
speculation here.).
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Re: [lubuntu-users] Desktop crashing (18.04)?

[Mark F]

>
> Now, It's just a matter of time till I have some strace info. I'll post to
> the bug report when I have something.
>

 I just wanted to send an update: no pcmanfm crashes (nor GIMP) since
running strace (as described in the previous post).

I'm starting to think strace's overhead is causing the mouse clicks to be
paced, preventing the crash from occurring. I mentioned in a previous post
that I've been living with this for awhile,[1] and that I had developed a
"feeling" that it had something to do with clicking too fast, a particular
pattern of something that was too aggressive. So... now that's evolving
into "it's the strace! it's *pacing* my mouse clicks for me." (ha). But,
maybe there's truth to that.

I did fool around with fast clicking, going crazy with the mouse (for a
couple days before starting strace). Nothing happened. So, there's probably
nothing to my "gut feeling" about it.

If it ever crashes with strace, I'll post to the bug report (Walter linked
to in a previous post).

[1] Unfortunately, I don't remember when I last upgraded. I know that I had
been out of support for a couple months by the time I upgraded to 18.04.
Previous to whatever version that was, I had been upgrading with each
release.

I just looked at the Ubuntu version history and I'm pretty sure this
started with 17.04. That's the version that would have fallen out of
support shortly before 18.04. (But, I could be mistaken how long I wasn't
getting automatic updates. Maybe it was longer and I was on 16.10. I'm
pretty sure it *was not* that long. But, it definitely wasn't longer. I'm
sure it was just a couple months.).
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