Comment 2 for bug 598645

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Stenten (stenten) wrote : Re: [945gme] Backlight off after resume from suspend

Please test with the current mainline kernel [1]. Installation instructions are here [2]. Also please test with the xorg-edgers packages [3]. Installation instructions:
sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update && sudo apt-get install ppa-purge
sudo apt-get upgrade
To revert: 'sudo ppa-purge xorg-edgers'.

Also see if the problem still happens when suspending from text mode [4].

[1]: http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/
[2]: https://wiki.ubuntu.com/KernelTeam/MainlineBuilds
[3]: https://launchpad.net/~xorg-edgers/+archive/ppa
[4]: https://wiki.ubuntu.com/DebuggingKernelSuspendHibernateResume#Suspending%20from%20text%20mode