Suspend/Sleep/Hibernate and Ubuntu

Do these features really not function within Ubuntu? It is pretty hard to believe that a modern operating system does not have a fully functioning sleep/suspend feature...

 

They do but I think it depends on the machine. On the thinkpad T61 Ubuntu 8.04 is supposed to be able to hibernate and sleep, with a little tweaking though

 

I have to been able to get it to function on the dv5z. I would love to go Ubuntu full time on my machine but the lack of sleep/suspend is a deal breaker. Any ideas?

 

If it doesn't work with your laptop now, it might work with the next release. You can also just shut down and and all of your documents open back up to where you left them when you start your laptop up again.

 

Have there been confirmed improvements in the sleep/hibernate features in Ibex?

 

Works on my XPS M1330

 

It's hard to believe that a modern computer doesn't actually follow the ACPI 2.0 standards, even though they've been out since, oh, 2001 or so. But it still happens. That's the main issue. Windows is perfectly happy to work with broken ACPI tables, whereas Linux isn't.

Basically, Linux has fully functioning sleep/suspend/hibernate, it's just that many machines (more often laptops) don't actually adhere to the specifications they claim to.

See here for some enlightenment on ACPI issues under Linux

 

Oops! My newb was showing

What is going to be the best way of getting my dv5z with it's retarded ACPI to work with Linux? or is waiting for the next release my only option?

 

Look at the page I linked to, and basically just try it. Usually updated BIOS versions fix a lot of issues with things like that. Each laptop is unique, and since I don't have (and am not planning on getting) a dv5z, it will basically just take some research.

I'd wager to say that most of the suspend/hibernate issues encountered are because of the graphics cards and using the binary drivers (fglrx in your case). Graphics drivers are the only reason I have ever had an issue with suspending or hibernating.

 

I've already taken a look at the DSDT and fixed the easy problems on the dv5z. Suspend2RAM is still broken, even with the 2.6.27-rc4 kernel. I think something's missing in the sequence of steps it takes to put the system to sleep, so that when you try to wake it up there's nothing there to wake it. Just a guess at the moment.

 

What problems have you fixed on the dv5z? Are you working on the sleep problem currently?

 

The ACPI temperature monitoring doesn't work on Linux because the DSDT specifically checks for Windows. I've removed those checks on mine so that temperature monitoring now works on Linux for me. There are some Windows-specific checks for the video output switch too, that I removed, but I haven't actually figured out if they do anything useful yet.

Yes, I'm trying to chase down the sleep problem. You can follow along here http://bugzilla.kernel.org/show_bug.cgi?id=11368

The thermal monitoring issue is here http://bugzilla.kernel.org/show_bug.cgi?id=11421 and I uploaded my fixed DSDT here
http://acpi.sourceforge.net/dsdt/view.php?manufacturer=HP&name=Pavilion+dv5+dv5z

 

Without the your correct DSDT settings is there a risk the laptop will overheat?

 

I don't know for sure, but I'd doubt it. Most of the fan speed and other operations are hardware based, rather than software based, at least in my experience. He's just making the sensors visible to Linux.

There's also a hardware-level overheat downclocking (or shutdown) that all modern processors support to protect you from damage.

 

Thank you for the reply....I read through some of the bug reports and it looked like it was just the monitoring/reporting of temps that was effected.

 

ACPI requires the OS to respond to most conditions. If the OS doesn't handle them, then you're kind of screwed. The thermal_zone allows the OS to start throttling the processor in response to higher temperatures. If you just rely on the hardware overheat protection, you could be running at the worst-case temperature for a long time, longer than if the OS was able to manage the temperatures correctly.

With the thermal_zone working, the OS can do a clean shutdown after hitting a critical temperature. Without it, the CPU just turns itself off abruptly, and you suffer data loss.

 

Newb question, how do I install your customize DSDT...

 

The one on the web site is source code, you need to compile it with iasl before you can use it. Or I guess I can post a binary version of it somewhere. You can get iasl from here http://acpica.org/downloads/

After you compile it, move it to /etc/initramfs-tools/DSDT.aml
then run "update-initramfs -u" and reboot.

On second thought - it's probably a bad idea to just install mine in your computer, there are other aspects of the DSDT that are specific to your machine. If you send me a copy of your current DSDT I can patch it and send it back to you.
You should be able to copy /proc/acpi/dsdt to a regular file and send it. PM if you want to go this route.