[Bug 410310] Re: update-manager inconsistent with download size

[Robert Roth]

Thanks Manfred, you've got a really good point there, and you've found the root of the problem. Setting to Triaged, and updating the description of the bug according to your highly detailed comment.
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** Changed in: update-manager (Ubuntu)
     Assignee: (unassigned) => Robert Roth (evfool)

** Changed in: update-manager (Ubuntu)
       Status: Incomplete => Confirmed

** Description changed:

  Binary package hint: update-manager
  
  There are three places, where the update-manager states the download size of an update:
  -For every package itself
  -For all packages together
  -During download
- All 3 state different sizes of a download. (see attachment)
- This is also the case in Karmic.
+ The first two and the third one differ. (see attachment - the total and the per-package difference has been fixed in the meantime, the difference between update-manager main window and the progress windows still exists)
+ 
+ When doing an update with update-manager some numbers displayed on screen come from update-manager and some from apt.
+ And now apt is displaying the numbers with decimal kilos (K=1000), and update-manager is displaying the numbers with binary kilos (K=1024). Even if the float problem is solved, this still gives a difference in display of about 4.8% for Megabyte numbers. (see some more details in my comment #9 above and some of the attached pictures).
+ 
+ Before this bug is set to 'Fix Released' I would like to raise the
+ question if it would make sense to consistently use one and the same
+ factor for kilo/mega representation throughout all package management
+ programs. This could be done either by changing humanize_size to decimal
+ as well, or changing apt/apt-pkg/strutl.cc to binary, or even by totally
+ eliminating humanize_size and using also the apt subroutines in update-
+ manager.
+ 
+ As far as I can see there is even another weakness in humanize_size (at
+ least in older versions, I have not checked the most recent ones yet):
+ the localization of the decimal separator is not correct and always
+ displayed as '.' even in 'decimal point is comma' local settings as with
+ German language.

** Changed in: update-manager (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: update-manager (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/410310

Title:
  update-manager inconsistent with download size

Status in Update Manager:
  Confirmed
Status in “update-manager” package in Ubuntu:
  Triaged

Bug description:
  Binary package hint: update-manager

  There are three places, where the update-manager states the download size of an update:
  -For every package itself
  -For all packages together
  -During download
  The first two and the third one differ. (see attachment - the total and the per-package difference has been fixed in the meantime, the difference between update-manager main window and the progress windows still exists)

  When doing an update with update-manager some numbers displayed on screen come from update-manager and some from apt.
  And now apt is displaying the numbers with decimal kilos (K=1000), and update-manager is displaying the numbers with binary kilos (K=1024). Even if the float problem is solved, this still gives a difference in display of about 4.8% for Megabyte numbers. (see some more details in my comment #9 above and some of the attached pictures).

  Before this bug is set to 'Fix Released' I would like to raise the
  question if it would make sense to consistently use one and the same
  factor for kilo/mega representation throughout all package management
  programs. This could be done either by changing humanize_size to
  decimal as well, or changing apt/apt-pkg/strutl.cc to binary, or even
  by totally eliminating humanize_size and using also the apt
  subroutines in update-manager.

  As far as I can see there is even another weakness in humanize_size
  (at least in older versions, I have not checked the most recent ones
  yet): the localization of the decimal separator is not correct and
  always displayed as '.' even in 'decimal point is comma' local
  settings as with German language.

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