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Old 06-08-2019, 02:53 PM   #1
Registered: Jul 2013
Distribution: Slackware 14 / current
Posts: 70

Rep: Reputation: Disabled
Is anyone else having trouble with okular-4.14.3-x86_64-3? Freezing, due to some polling, it seems.

As I stated in the title, okular-4.14.3-x86_64-3 (64bit, multilib) has been acting weird, freezing after a bit of scrolling through any pdf that has pictures as pages.

I ran a quick gdb check (without debug symbols since I don't have the dev build of okular) and it creates a gazillion threads.

Like zo:
[New Thread 0x7fffe1b26700 (LWP 9908)]
[New Thread 0x7fffe2327700 (LWP 9909)]
[Thread 0x7fffe1b26700 (LWP 9908) exited]
[Thread 0x7fffe2327700 (LWP 9909) exited]
[New Thread 0x7fffe1b26700 (LWP 9910)]
[Thread 0x7fffe1b26700 (LWP 9910) exited]
[New Thread 0x7fffe1b26700 (LWP 9911)]
[New Thread 0x7fffe2327700 (LWP 9912)]
[Thread 0x7fffe1b26700 (LWP 9911) exited]
[New Thread 0x7fffe1b26700 (LWP 9913)]
[Thread 0x7fffe2327700 (LWP 9912) exited]
[Thread 0x7fffe1b26700 (LWP 9913) exited]
[New Thread 0x7fffe1b26700 (LWP 9914)]
[New Thread 0x7fffe2327700 (LWP 9915)]
[Thread 0x7fffe1b26700 (LWP 9914) exited]
[Thread 0x7fffe2327700 (LWP 9915) exited]
[New Thread 0x7fffe1b26700 (LWP 9916)]
[Thread 0x7fffe1b26700 (LWP 9916) exited]
[New Thread 0x7fffe1b26700 (LWP 9917)]
[New Thread 0x7fffe2327700 (LWP 9918)]
[Thread 0x7fffe1b26700 (LWP 9917) exited]
[Thread 0x7fffe2327700 (LWP 9918) exited]
[New Thread 0x7fffe1b26700 (LWP 9919)]
[Thread 0x7fffe1b26700 (LWP 9919) exited]
[New Thread 0x7fffe1b26700 (LWP 9920)]
[New Thread 0x7fffe2327700 (LWP 9921)]
[Thread 0x7fffe1b26700 (LWP 9920) exited]
[Thread 0x7fffe2327700 (LWP 9921) exited]
[New Thread 0x7fffe2327700 (LWP 9922)]
[Thread 0x7fffe2327700 (LWP 9922) exited]
[New Thread 0x7fffe2327700 (LWP 9924)]
[New Thread 0x7fffe1b26700 (LWP 9925)]
[Thread 0x7fffe2327700 (LWP 9924) exited]
[New Thread 0x7fffe2327700 (LWP 9926)]
[Thread 0x7fffe1b26700 (LWP 9925) exited]
[Thread 0x7fffe2327700 (LWP 9926) exited]
[New Thread 0x7fffe2327700 (LWP 9927)]
[New Thread 0x7fffe1b26700 (LWP 9928)]
[Thread 0x7fffe2327700 (LWP 9927) exited]
[Thread 0x7fffe1b26700 (LWP 9928) exited]
[New Thread 0x7fffe1b26700 (LWP 9929)]
[Thread 0x7fffe1b26700 (LWP 9929) exited]
[New Thread 0x7fffe1b26700 (LWP 9930)]
[New Thread 0x7fffe2327700 (LWP 9931)]
[Thread 0x7fffe1b26700 (LWP 9930) exited]
[Thread 0x7fffe2327700 (LWP 9931) exited]
[New Thread 0x7fffe2327700 (LWP 9932)]
[Thread 0x7fffe2327700 (LWP 9932) exited]
[New Thread 0x7fffe2327700 (LWP 9933)]
[New Thread 0x7fffe1b26700 (LWP 9934)]
[Thread 0x7fffe2327700 (LWP 9933) exited]
[New Thread 0x7fffe2327700 (LWP 9935)]
[Thread 0x7fffe1b26700 (LWP 9934) exited]
[Thread 0x7fffe2327700 (LWP 9935) exited]
[New Thread 0x7fffe2327700 (LWP 9936)]
[New Thread 0x7fffe1b26700 (LWP 9937)]
[Thread 0x7fffe2327700 (LWP 9936) exited]
[New Thread 0x7fffe2327700 (LWP 9939)]
[Thread 0x7fffe1b26700 (LWP 9937) exited]
[Thread 0x7fffe2327700 (LWP 9939) exited]
[New Thread 0x7fffe2327700 (LWP 9940)]
[New Thread 0x7fffe1b26700 (LWP 9941)]
[Thread 0x7fffe2327700 (LWP 9940) exited]
[New Thread 0x7fffe2327700 (LWP 9942)]
[Thread 0x7fffe1b26700 (LWP 9941) exited]
[Thread 0x7fffe2327700 (LWP 9942) exited]
[New Thread 0x7fffe2327700 (LWP 9943)]
[New Thread 0x7fffe1b26700 (LWP 9944)]
[Thread 0x7fffe2327700 (LWP 9943) exited]
[New Thread 0x7fffe2327700 (LWP 9945)]
[New Thread 0x7fffe0b3c700 (LWP 9946)]
[Thread 0x7fffe2327700 (LWP 9945) exited]
[Thread 0x7fffe1b26700 (LWP 9944) exited]
[New Thread 0x7fffe0b3c700 (LWP 9947)]
[Thread 0x7fffe0b3c700 (LWP 9946) exited]
[Thread 0x7fffe0b3c700 (LWP 9947) exited]
Thread 1 "okular" received signal SIGINT, Interrupt.
0x00007ffff4f4fa19 in poll () from /lib64/
(gdb) bt
#0  0x00007ffff4f4fa19 in poll () at /lib64/
#1  0x00007ffff256f65e in  () at /usr/lib64/
#2  0x00007ffff256f77f in g_main_context_iteration () at /usr/lib64/
#3  0x00007ffff55eabb4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/
#4  0x00007ffff608c337 in  () at /usr/lib64/
#5  0x00007ffff55bea9f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/
#6  0x00007ffff55bed76 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/
#7  0x00007ffff55c3a8a in QCoreApplication::exec() () at /usr/lib64/
#8  0x000000000040a655 in  ()
#9  0x00007ffff4e68b5b in __libc_start_main () at /lib64/
#10 0x000000000040b08a in _start ()
It isn't on this output dump, but earlier libcups was in the backtrace list, too, at the top, no less.
Meaning, perhaps something weird is going on with that in combination with okular.

Thing is, I don't really know qt applications all that well, including KDE and KDE on Slackware seems a bit...weird.
Anyway, uname:
4.19.25 #1 SMP Sat Feb 23 13:39:44 CST 2019 x86_64 AMD Ryzen 7 2700 Eight-Core Processor AuthenticAMD GNU/Linux
I'll provide more info, don't know what else to post, really.

Alternatives are welcome. Gotta have at least rudimentary vi key support, though. j,k, etc.
P.P.S.: Switched to zathura, pretty good so far.

But I'm still interested in solving this.

Last edited by Geist; 06-08-2019 at 03:04 PM.
Old 06-08-2019, 06:48 PM   #2
Registered: Mar 2004
Location: Prince Rupert, B.C., Canada
Distribution: Slackware, OpenBSD, Arch
Posts: 5,768

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I'm running okular in XFCE on Slackware64-current. Just opened a pdf with multiple pages and simple graphics. Working as expected.
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Old 06-08-2019, 08:18 PM   #3
LQ Guru
Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Ubuntu MATE, Mageia, and whatever VMs I happen to be playing with
Posts: 14,950
Blog Entries: 25

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I frequently use Okular v. 0.20.3 (KDE v. 4.14.32) on Slackware 14.2 and have experienced no issues with it. Same with Okular on Mageia, but I can't access the version number right now.
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Old 06-09-2019, 02:15 PM   #4
Registered: Jul 2013
Distribution: Slackware 14 / current
Posts: 70

Original Poster
Rep: Reputation: Disabled
It seems to be more selective than I thought. Some pdfs, even those who are wholly picture based, do not freeze it.
Those that do, the act of changing pages makes it gradually more unresponsive, but in a still responsive way (as in, its slower but still fast), until it suddenly freezes up completely.

I'm suspecting some sort of memory problem, perhaps. Or maybe it's some metadata.
Anyway, with this complication, it's quickly skittering into the "I don't know if I want to dedicate too much time on this" territory, especially since zathura is really good.

Thanks, though.
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