[Bug 50437] Re: Resume from hibernation may fail because swap partition UUID does not match /etc/initramfs-tools/conf.d/resume

[maximilian attems]

Hey Martin,

On Wed, Sep 11, 2013 at 11:08:14AM -0000, Martin Pitt wrote:
> 
> Cheers, these look nice. That will avoid the pointless 5 s waiting
> during boot.

Thanks for the review, will add this info!

> The only issue now is that you can't choose to entirely
> disable hibernation by creating an empty file or having no file at
> all; not sure how much of an issue that is. Perhaps if the file exists
> and is empty that shold indicate "disable resume", and if the file
> doesn't exist, "automatic resume"?

There is the bootparam "noresume", if you add that to your bootloader
command line no resume is attempted. It overrides any RESUME setting.

I'd assume empty RESUME files could only be created by mistake,
whereas the noresume params exists since looong and is also the
corresponding linux parameter (when no initramfs is at play).

Best,

-- 
maks

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https://bugs.launchpad.net/bugs/50437

Title:
  Resume from hibernation may fail because swap partition UUID does not
  match /etc/initramfs-tools/conf.d/resume

Status in “initramfs-tools” package in Ubuntu:
  Triaged
Status in “ubiquity” package in Ubuntu:
  New
Status in Baltix GNU/Linux:
  Confirmed

Bug description:
  There are a variety of circumstances which can cause the swap
  partition UUID to get out of sync with the system configuration, for
  example:

  1. User edits /etc/fstab to specify a different swap partition, either by UUID or by hardcoding the device path
  2. User reinitializes their swap partition with a new UUID using mkswap
  3. User repartitions their disk and thereby reinitializes the swap partition with a new UUID

  If this happens, the system will fail to resume from hibernation
  because it continues to look for the swap partition as specified in
  /etc/initramfs-tools/conf.d/resume.  Not finding this device, it will
  continue with normal system startup, as if no hibernation had taken
  place.

  It would be better if the system were more robust in the face of such
  changes.

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