Invisible Calibre permanently hangs in memory or instant exit after start it

Bug #1699435 reported by Alexey V. Tatarinov on 2017-06-21
This bug affects 1 person
Affects Status Importance Assigned to Milestone

Bug Description

I have new notebook "Lenovo V310-15ISK 80SY0180RK" CPU 4405U, 4Gb RAM, with installed Windows 7 x86 and many soft on it. After installing Calibre 3.0 I can't see anything from the program on the screen. And I see hanging "calibre.exe" in process list (Process Explorer from Sysinternals) constantly. And instant exit after start Calibre when notebook works on the battery.
So I think its depends from video subsystem "Intel HD Graphics 510" (with latest drivers and/or power saving modes in the CPU 4405U. OpenGL 4.4.0(4.40). Open CL 1.2.

Added debug info:

C:\Program Files\Calibre2>calibre-debug.exe -g
calibre 3.0 embedded-python: True is64bit: False
Windows-7-6.1.7601-SP1 Windows ('32bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.12+
Windows: ('7', '6.1.7601', 'SP1', u'Multiprocessor Free')
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 71.9842323651 x 71.9822878229
Using calibre Qt style: True
Traceback (most recent call last):
  File "site-packages\calibre\gui2\wizard\", line 763, in initializePage
  File "", line 311, in expanduser
UnicodeDecodeError: 'utf8' codec can't decode byte 0xcd in position 9: invalid continuation byte

Changed in calibre:
status: New → Incomplete
description: updated

Fixed in branch master. The fix will be in the next release. calibre is usually released every alternate Friday.

 status fixreleased

Changed in calibre:
status: Incomplete → Fix Released
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