CentOS - Oct 2007 - CentOS 5 LiveCD better than the real one?

Folks, 

I am terribly puzzled by an issue reported as bug 2381
[http://bugs.centos.org/view.php?id=2381] ? definitely an upstream bug, as it
does the same under X/OS 5 and StartCom 5.

Simply put: Hibernation fails with horrendous I/O errors after swsusp starts
dumping to swap.

What bugs me is that hibernating from the CentOS 5 LiveCD *works*!!! (on the
same hardware)

How could I investigate to see what is the relevant difference between the
LiveCD and the installed system, WRT suspend-to-disk?

It has been said that "CentOS 5 i386 Live CD is based on the ADIOS Live CD
Project", but also that "CentOS Project would like to thank Patrice
Guay for the creation of this CD". Who is supposed to know better about
this issue?

Also, how could I check if upstream has a similar bug report? I don't have
any RHN acct.

It's a shame that RHEL5 && clones fail to work properly with a
specific laptop (Acer Travelmate 5310/5320/5710/5720 have the same architectural
design), but an ad-hoc LiveCD works!

Thanks,
R-C



       
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Radu-Cristian FOTESCU wrote:
> I am terribly puzzled by an issue reported as bug 2381 
> [http://bugs.centos.org/view.php?id=2381] ? definitely an upstream 
> bug, as it does the same under X/OS 5 and StartCom 5.
>
> Simply put: Hibernation fails with horrendous I/O errors after swsusp 
> starts dumping to swap.
>
> What bugs me is that hibernating from the CentOS 5 LiveCD *works*!!! 
> (on the same hardware)
>
> How could I investigate to see what is the relevant difference between 
> the LiveCD and the installed system, WRT suspend-to-disk?
>
> It has been said that "CentOS 5 i386 Live CD is based on the ADIOS 
> Live CD Project", but also that "CentOS Project would like to
thank
> Patrice Guay for the creation of this CD". Who is supposed to know 
> better about this issue?
>
> [...]
>
> It's a shame that RHEL5 && clones fail to work properly with a 
> specific laptop (Acer Travelmate 5310/5320/5710/5720 have the same 
> architectural design), but an ad-hoc LiveCD works!
>
Hi Radu-Christian,

I have a similar problem with the suspend/hibernate function under 
CentOS 5 on my personal laptop (Acer Travelmate 8204). My latest LiveCD 
respins, which are no longer based on the Adios Live CD project, have 
the same problem with suspend/hibernate.

I will need to test the hibernation functionality under the CentOS 5 
LiveCD (version 5.00) later today to see how it behaves.

Regards,
--
Patrice

On Thu, 2007-10-11 at 05:33 -0400, Radu-Cristian FOTESCU
wrote:
> Folks, 
> 
> I am terribly puzzled by an issue reported as bug 2381
> [http://bugs.centos.org/view.php?id=2381] ? definitely an upstream
> bug, as it does the same under X/OS 5 and StartCom 5.
> 
> Simply put: Hibernation fails with horrendous I/O errors after swsusp
> starts dumping to swap.
If you are using the 8.41 ATI driver don't as it will break your
suspend/resume. I don't know if the nvidia proprietary one behaves. Not
sure about this one but worth looking into: iirc if your swap
partition/available swap is too small hibernate can fail. So perhaps try
without any propietary gfx driver and with a swap partition that's say
twice the size of your memory. Don't use vga=... in your grub.conf as it
may break suspend/resume. At least it does on my Acer TM6465 laptop.

Also make sure that the kvm, kvm_intel, iwl3945 modules are unloaded
before suspending. This is done in /etc/pm/config.d/unload_modules
Make sure you # chmod 755 unload_modules

File contains something like:
SUSPEND_MODULES="iwl3945 mac80211 cfg80211 kvm_intel kvm"

See this "quirk" webpage with tons of help:
http://people.freedesktop.org/~hughsient/quirk/

Answer the questions on this page:
http://people.freedesktop.org/~hughsient/quirk/quirk-suspend-debug.html
and try out the suggestions.

If that does not help get the latest hal-info source (git tree) and see
if there are any solutions in there for your laptop. Specifically look
in this file:
/usr/share/hal/fdi/information/10freedesktop/20-video-quirk-pm-acer.fdi

The hal-info rpm that is included in F8T3 does not have any entries for
the Acer TM5xxx laptops that you mentioned so check out the latest
hal-info git tree.
> What bugs me is that hibernating from the CentOS 5 LiveCD *works*!!!
> (on the same hardware)
At least you know that it can work. That's better than not working at
all :)
> How could I investigate to see what is the relevant difference between
> the LiveCD and the installed system, WRT suspend-to-disk?
Beats me. Start with the suggestions I gave you.
> It has been said that "CentOS 5 i386 Live CD is based on the ADIOS
> Live CD Project", but also that "CentOS Project would like to
thank
> Patrice Guay for the creation of this CD". Who is supposed to know
> better about this issue?
Don't know.
> Also, how could I check if upstream has a similar bug report? I don't
> have any RHN acct.
> 
> It's a shame that RHEL5 && clones fail to work properly with a
> specific laptop (Acer Travelmate 5310/5320/5710/5720 have the same
> architectural design), but an ad-hoc LiveCD works!
Suspend/resume/hibernate stuff is complicated and the zillions of
different laptops out there all with their (buggy) bios and acpi
implementations isn't helping either. So with that in mind imho I think
it could be much worse. There is a lot of work going on to ensure that
laptops just work. Laptop quirks are gradually added to hal-info which
should make more and more laptops work correctly. If you find the quirk
fix for your laptop please send the relevant info to the hal-info
mailing list (see that "quirk" web page I gave above). 

Regards,
Patrick