[CentOS] CentOS 5.0 suspend to disk (hibernate)

On Tue, 1 May 2007, Roland Renaud wrote:

> The RHEL 5 release notes for their desktop version claim
>  "Improved ACPI support with features such as suspend to disk"
> but this isn't working with CentOS 5.
> 
> I've installed all the packages and updates for CentOS 5 i386 on a
> ThinkPad T43 but when selecting suspend, Gnome pops up a URL to a site
> that didn't seem to give a solution.
> Gnome makes an entry in /var/log/messages indicating that the suspend
> button was pressed, immediately followed by the "Resuming computer" message.
> 
> Suspend to ram and suspend to disk work on Ubuntu 6.10 on this machine
> with an older kernel (2.6.17-10-generic) than CentOS 5 has.
> 
> Are there some packages or a different kernel that should be installed?
> Will this feature be added to CentOS 5 or is it considered a server
> distro that doesn't need this?
> Thinkwiki.org mentions the swsusp program but it seems to be absent.
> 
> CentOS 4 and CentOS 5 have been running well on this machine but
> having the suspend feature would be very nice.

Hibernate to disk and suspend to memory both work on my T43 with CentOS 5.
My feeling is this is mostly related to the graphical card. I have an 
Intel 915M, and I know the ATI version is known to have more problems.

For me I only needed to add a kernel boot option (acpi_sleep=s3_bios).

A very important resource for Linux problems with your thinkpad is 
ThinkWiki:

	http://www.thinkwiki.org/wiki/ThinkWiki

Almost every problems is discussed in detail (in a distribution-agnostic 
way) and solutions are provided.

	http://www.thinkwiki.org/wiki/Problems_with_ACPI_suspend-to-ram
	http://www.thinkwiki.org/wiki/Problem_with_display_remaining_black_after_resume

Kind regards,
--   dag wieers,  dag at wieers.com,  http://dag.wieers.com/   --
[all I want is a warm bed and a kind word and unlimited power]