here's the result
Code:
calibre 2.68 embedded-python: True is64bit: False
Linux-4.4.0-35-generic-i686-athlon-with-debian-stretch-sid Linux ('32bit', 'ELF')
('Linux', '4.4.0-35-generic', '#54-Ubuntu SMP Tue Aug 9 17:03:17 UTC 2016')
Python 2.7.9
Linux: ('debian', 'stretch/sid', '')
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 81.5518394649 x 81.6428571429
thank you