Bug 128617

Summary:	[powersave] optional do not modify MBR
Product:	[openSUSE] SUSE Linux 10.1	Reporter:	Alexander Lavrinenko <lavrinenko_alex>
Component:	Basesystem	Assignee:	Forgotten User ZhJd0F0L3x <forgotten_ZhJd0F0L3x>
Status:	RESOLVED INVALID	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	adrian.schroeter, aj, ast, behlert
Version:	Alpha 1
Target Milestone:	---
Hardware:	All
OS:	Linux
Whiteboard:
Found By:	Other	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Alexander Lavrinenko 2005-10-16 07:45:16 UTC

Right now powersaved modifies mbr upon suspend-to-disk in order to make sure 
that next boot will use proper kernel. This is smart, but I have 2 OSs 
installed - one is SuSE 10.1 and second is WinXP that came with my laptop. 
And after linux s-t-d I'd like to get boot menu again. Please make mbr 
modification upon suspend configurable in YaST and not hardcoded 
in /usr/lib/powersave/scripts/prepare_suspend_to_disk. Right now I had to 
comment out the following line in this file: 
grub-once $NEXT_BOOT > /dev/null 2>&1 
 
Thanks in advance.

Comment 1 Thomas Renninger 2005-10-17 09:34:55 UTC

This is for security reasons. If you modify the filesystem that you suspended while working with an other OS, you are in big trouble and may loose all your data.
I don't like the current solution myself...
We should at least provide a config variable for it (there is already one?)...
Seife?

Comment 2 Danny Al-Gaaf 2005-10-17 19:40:34 UTC

Yes there is: POWERSAVE_BOOT_LOADER in /etc/sysconfig/powersave/common. If you set this to 'OTHER' this should not happen on resume.

Close the bug?

Comment 3 Alexander Lavrinenko 2005-10-18 18:39:17 UTC

Good, just set it to "OTHER". Can we have this option configurable within yast somewhere in "Power Management" section?

Comment 4 Forgotten User ZhJd0F0L3x 2005-10-30 09:25:48 UTC

i really do not want to have this easily configurable without reading the documentation. It really is a great way to lose your data if you boot other operating systems and mount filesystems while one OS is suspended, so i'd like to keep this as an "expert" option and not easily accessible in YaST.

I'll reassign this to PM to decide what to do.

Comment 5 Alexander Lavrinenko 2005-11-02 19:47:50 UTC

I have only 2 OSs installed on my laptop - WinXP Home and suse 10.1. I think it's possible to detect if there's other linux kernel boot option in grub and only in this case only modify bootloader. In my case I'd really like to suspend-to-disk in linux and choose windows on very next boot from grub boot menu instead of booting directly in linux...

Comment 6 Forgotten User ZhJd0F0L3x 2005-11-02 21:11:47 UTC

yes, and i want to prevent exactly this to save unexperienced users from losing your data.
Users who know what they are doing will surely find the bootloader variable and change it to somehting different than GRUB :-)

Comment 7 Andreas Jaeger 2005-11-24 10:26:19 UTC

Let's document this a bit better but I agree with Stefan, we have to avoid dataloss here.

Comment 8 Forgotten User ZhJd0F0L3x 2005-12-05 14:47:24 UTC

Well, i am open to suggestions on how to improve the documentation.
Would a powersave FAQ on opensuse.org make sense?

Comment 9 Andreas Jaeger 2005-12-05 16:10:05 UTC

Yes, such a page would be fine...

Comment 10 Anja Stock 2006-06-13 06:46:10 UTC

Stefan? What is the status here?

Comment 11 Forgotten User ZhJd0F0L3x 2006-06-13 12:32:14 UTC

somebody needs to write the FAQ :-)

Comment 12 Stefan Behlert 2006-10-18 12:39:09 UTC

Has this been done meanwhile?

Comment 13 Forgotten User ZhJd0F0L3x 2006-10-18 12:58:12 UTC

No. Anyway, it's not a bug, it's a feature.