I came across this whilst experimenting around my recent question regarding
saving and restoring sessions in Leo. There seems to be a problem running
with Python 2.6 and pyQt 4.8.6.
I am running Kubuntu on two different machines. If I run with python 2:
jkn@lanark:~/leo-editor/leo-editor$ python launchLeo.py
setting leoID from os.getenv('USER'): 'jkn'
reading settings in
/home/jkn/leo-editor/leo-editor/leo/config/leoSettings.leo
reading settings in /home/jkn/.leo/workbook.leo
** isPython3: False
Leo 5.4, build 20161225051646, Sun Dec 25 05:16:46 EST 2016
Git repo info: branch = master, commit = a14ca3603bc9
Python 2.7.6, PyQt version 4.8.6
linux2
then after the initial screen, Leo seems to hang, with a CPU usage (seen
via 'top') of close to 100%.
If I use the same version with Python 3 (and a later version of PyQt):
Leo Log Window
Leo 5.4, build 20161225051646, Sun Dec 25 05:16:46 EST 2016
Git repo info: branch = master, commit = a14ca3603bc9
Python 3.4.3, PyQt version 5.2.1
linux
setting leoID from os.getenv('USER'): 'jkn'
load dir: /home/jkn/leo-editor/leo-editor/leo/core
global config dir: /home/jkn/leo-editor/leo-editor/leo/config
home dir: /home/jkn
reading settings in
/home/jkn/leo-editor/leo-editor/leo/config/leoSettings.leo
Then all is well.
I have tried something similar on a second machine with similar results;
the common factor appears to be pyQt 4.8.6 rather than the version of
Python.
FWIW --debug on the Leo command line shows nothing very interesting.
Having found out that I can get around this by using Python3 (and hence
PyQt5) this is not a major issue at the moment, but I wondered if it was
known about? I can supply more detail if useful.
Oh, I tried looking at what was happening with 'strace'. This seems to show
a lot of activity after startup, and before I have to kill the process:
[many repetitions]
write(3, "\1\0\0\0\0\0\0\0", 8) =
8
write(3, "\1\0\0\0\0\0\0\0", 8) =
8
write(3, "\1\0\0\0\0\0\0\0", 8) =
8
write(3, "\1\0\0\0\0\0\0\0", 8) =
8
write(3, "\1\0\0\0\0\0\0\0", 8) =
8
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=3408, si_uid=1000}
---
+++ killed by SIGTERM +++
Cheers
Jon N
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