Hi, kix, Maximilian and Michael.
First of all: this bug affected kernel-based hibernation, too (details follow).
So, I performed something like git bisect to determine why the bug was
magically fixed. I debootstrapped a lot of minimal sid Debian systems from
snapshot.debian.org. I wrote scripts, which automatically bootstrap system, run
it in Qemu and check whenever this system contains bug. Steps to reproduce I
used, was the following:
1. Bootstrap system (with swap present in /etc/fstab)
2. Start it in Qemu, install uswsusp, run s2disk, this causes Qemu to close
3. Start the system in Qemu again. If it wakes up - there is no bug, the system
is good. If starts from scratch - bad
Result is:
current (2014-09-01) - good
http://snapshot.debian.org/archive/debian/20130601T035649Z - bad
http://snapshot.debian.org/archive/debian/20140101T042327Z - good
http://snapshot.debian.org/archive/debian/20130901T040738Z - bad
http://snapshot.debian.org/archive/debian/20131101T040405Z - good
http://snapshot.debian.org/archive/debian/20131001T035353Z - good
http://snapshot.debian.org/archive/debian/20130915T035028Z - bad
http://snapshot.debian.org/archive/debian/20130924T035052Z - good
http://snapshot.debian.org/archive/debian/20130920T034833Z - bad
http://snapshot.debian.org/archive/debian/20130922T035833Z - bad
http://snapshot.debian.org/archive/debian/20130923T035105Z - good
http://snapshot.debian.org/archive/debian/20130922T154933Z - bad
http://snapshot.debian.org/archive/debian/20130922T220333Z - good
So, the bug was fixed in 20130922T154933Z .. 20130922T220333Z.
Only one package (in this minimal systems) was updates at this time:
initramfs-tools: it was bumped from 0.113 to 0.114.
Looking at the git log for initramfs-tools it seems that the bug was fixed in
this commit:
commit fef37d599aae9f2f3fc6808b46e901a7a4267c76
Author: maximilian attems m...@debian.org
Date: Wed Sep 11 00:40:10 2013 +0200
hooks: Add resume hook instead of hardcoding RESUME once on preinst
This logic is better run every time on update-initramfs,
as swap partition of a system might change.
Also there are scenarios where the preinstall picks up
a wrong value that stays wrongly hardcoded.
This results in a 5s useless wait on boot.
The biggest swap partition is used as valid guess.
This was previously the logic and is the logic used by ubiquity
(Ubuntu live installer) too.
Closes: #565225, LP 50437.
Thanks-to: Dmitrijs Ledkovs launch...@surgut.co.uk
Reviewed-by: Martin Pitt martin.p...@ubuntu.com
Reviewed-by: Michael Prokop m...@debian.org
Signed-off-by: maximilian attems m...@debian.org
If you want, I can give you scripts I wrote, I can preform bisect again for
some reason, I can help with testing/reproducing etc.
I want to point some notes: I'm not Debian developer nor Debian maintainer. I'm
just a bug reporter. This bug currently doesn't affect me, because 1) it is
fixed 2) i can write resume file myself. I don't know whenever the bug is
really fixed now or this is just some trick. I don't know how to fix it the
best way. I don't understand some of the letters in this bug report. But I want
to help you with fixing this bug.
Michael Prokop:
Are you willing to work on this? :)
I had worked just now. So, now please say me is this bug really fixed or not.
Also, the bug was reproducible for kernel-based hibernation on 20130922T154933Z
and not reproducible on 20130922T220333Z (i. e. before and after the
initramfs-tools 0.114 release). Steps:
1. Bootstrap 20130922T154933Z (without swap)
2. Install pm-utils
3. Add swap
4. Reboot
5. dpkg-reconfigure initramfs-tools
6. pm-hibernate (fails)
7. Upgrade to initramfs-tools 0.114 (this will cause reconfiguring)
8. pm-hibernate (works)
I think bug still is not fixed. Because initramfs-tools just uses current swap
and doesn't use /etc/uswsusp.conf. But probably the bug is fixed for
kernel-based hibernation. What to do? I don't know. Maybe uswsusp should
always use current swap or add initramfs-tools hook which reads
/etc/uswsusp.conf and writes resume or pick any solution from this bug
report or debian-devel discussion.
I reopened this bug to make sure you will answer my message, will not forget
this bug and will really resolve it.
==
Askar Safin
http://vk.com/safinaskar
Moscow, Russia
Moscow State University, http://msu.ru , Faculty of Mechanics and Mathematics,
Department of Mathematical Logic and Theory of Algorithms
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