Calibre suddenly won't start up on Linux Mint

BigGeoff · 04-25-2019, 04:00 AM

After years of faultless operation of Calibre, it just failed to start up last night, either from the menu bar icon or from a terminal window with no error messages anywhere. The only thing I can find running in system monitor is a process called calibre-parallel. Completely lost here. Anyone any idea how to identify the problem?

Thanks all

Geoff

kovidgoyal · 04-25-2019, 04:05 AM

Run as

calibre-debug -g

BigGeoff · 04-25-2019, 04:16 AM

Hi Kovid - I'm honoured!

I get this

geoff@nuc ~ $ calibre-debug -g
calibre 3.41.3 embedded-python: True is64bit: True
Linux-4.4.0-146-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF')
('Linux', '4.4.0-146-generic', '#172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019')
Python 2.7.15
Linux: ('debian', 'stretch/sid', '')
Interface language: en_GB
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: inf x inf
physicalDpi: -34091302.912 x -60606760.7324
Using calibre Qt style: True
geoff@nuc ~ $

I suppose the physicalDpi has an explanation? I recently got a new display and this is probably the first time I have fired up Calibre since I got it.

kovidgoyal · 04-25-2019, 04:55 AM

Yeah the DPI is the issue, a bit of googling should show you a few other people withth eissue on linux. I cant recall what th eworkaround was, but offhand you can try turning off auto-scaling with

QT_SCALE_FACTOR=1 calibre

BigGeoff · 04-25-2019, 05:23 AM

Thanks Kovid, I'll search round on that. Confirmed by doing calibre-debug --test-build and all fine except for this:
test_qt (calibre.test_build.BuildTest) ...
(calibre-debug:12918): Gtk-WARNING **: cannot open display:

unfortunately not cured with 'QT_SCALE_FACTOR=1 calibre' in terminal

gbm · 04-25-2019, 07:21 AM

Quote:

Originally Posted by BigGeoff

Thanks Kovid, I'll search round on that. Confirmed by doing calibre-debug --test-build and all fine except for this:
test_qt (calibre.test_build.BuildTest) ...
(calibre-debug:12918): Gtk-WARNING **: cannot open display:

unfortunately not cured with 'QT_SCALE_FACTOR=1 calibre' in terminal

https://bbs.archlinux.org/viewtopic.php?id=218447

bernie

BigGeoff · 04-26-2019, 07:06 AM

Thanks Bernie but not sorted. I think I will shift Calibre onto another system I have with a lower res display for now and hope it gets sorted later.

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04-25-2019, 04:00 AM	#1
BigGeoff Junior Member Posts: 4 Karma: 10 Join Date: Feb 2011 Device: Samsung Galaxy Tab Pro	Calibre suddenly won't start up on Linux Mint After years of faultless operation of Calibre, it just failed to start up last night, either from the menu bar icon or from a terminal window with no error messages anywhere. The only thing I can find running in system monitor is a process called calibre-parallel. Completely lost here. Anyone any idea how to identify the problem? Thanks all Geoff

04-25-2019, 04:05 AM	#2
kovidgoyal creator of calibre Posts: 45,604 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Run as calibre-debug -g

04-25-2019, 04:16 AM	#3
BigGeoff Junior Member Posts: 4 Karma: 10 Join Date: Feb 2011 Device: Samsung Galaxy Tab Pro	Hi Kovid - I'm honoured! I get this geoff@nuc ~ $ calibre-debug -g calibre 3.41.3 embedded-python: True is64bit: True Linux-4.4.0-146-generic-x86_64-with-debian-stretch-sid Linux ('64bit', 'ELF') ('Linux', '4.4.0-146-generic', '#172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019') Python 2.7.15 Linux: ('debian', 'stretch/sid', '') Interface language: en_GB Turning on automatic hidpi scaling devicePixelRatio: 1.0 logicalDpi: inf x inf physicalDpi: -34091302.912 x -60606760.7324 Using calibre Qt style: True geoff@nuc ~ $ I suppose the physicalDpi has an explanation? I recently got a new display and this is probably the first time I have fired up Calibre since I got it.

04-25-2019, 04:55 AM	#4
kovidgoyal creator of calibre Posts: 45,604 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Yeah the DPI is the issue, a bit of googling should show you a few other people withth eissue on linux. I cant recall what th eworkaround was, but offhand you can try turning off auto-scaling with QT_SCALE_FACTOR=1 calibre

04-25-2019, 05:23 AM	#5
BigGeoff Junior Member Posts: 4 Karma: 10 Join Date: Feb 2011 Device: Samsung Galaxy Tab Pro	Thanks Kovid, I'll search round on that. Confirmed by doing calibre-debug --test-build and all fine except for this: test_qt (calibre.test_build.BuildTest) ... (calibre-debug:12918): Gtk-WARNING **: cannot open display: unfortunately not cured with 'QT_SCALE_FACTOR=1 calibre' in terminal

04-26-2019, 07:06 AM	#7
BigGeoff Junior Member Posts: 4 Karma: 10 Join Date: Feb 2011 Device: Samsung Galaxy Tab Pro	Thanks Bernie but not sorted. I think I will shift Calibre onto another system I have with a lower res display for now and hope it gets sorted later.

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