“Caution! This is a lengthy post and not intended for casual reading. You can only appreciate this if you’ve faced the issue.”
At last, I am able to hibernate and resume my system successfully, which has been bothering for quite some time now. Just before writing this post, I hibernated and resumed my system for a whopping 15 times in a row!
Before I explain what worked for me here’s what I have:
For me, suspend always worked but on hibernating the system the screen goes black, with a blinking text cursor in the upper left corner and then the screen turns off but the power LED is still lit and the fan remains active till I press the power button to forcibly shut the system.
While there could be numerous reasons for hibernate/suspend not working, mine was attributed to the graphics card driver settings and the way the power management software dealt with the state while hibernating/resuming. After going through numerous forums, wikis and blogs hunting for the solution, I can safely say that 90% of the hibernate/suspend issues are attributed to the same.
Since I didn’t find the solution to the hibernate problem at a single place, it came out of a lot of trial and error. According to me, it makes sense to understand a couple of things before trying out the solution.
This suspend is a power saving mode while hibernate is a power sleep mode.
Now enough of theory, let’s get onto some practicals:
If you haven’t changed the default settings, Ubuntu Gutsy would most likely be using ACPI. Here’s how I proceeded:
Option “NvAGP” “1”
4. Prevent the OS from loading the default agpgart and the AGP driver for the chipset by adding the following in the blacklisted modules(type sudo gedit /etc/modprobe.d/blacklist on a terminal)
5. Modify ACPI settings
On a terminal type: sudo gedit /etc/default/acpi-support and ensure the following:
6. Finally if you’re using compiz (desktop-effects) in conjunction with NVIDIA binary drivers, make sure your “Sync to VBLANK” option in “Advanced Desktop Effects Settings > General > Display settings” is *disabled*. You can set this option to false by running:
gconftool --set /apps/compiz/general/screen0/options/sync_to_vblank 0 --type bool
This is just a compilation of information gathered through various forums/websites. Hopefully hibernate should work well by playing around with the settings as explained above. If it doesn’t, I can just say Good Luck! Keep trying! And please post anything which helped to get your Vostro hibernate 🙂