Screen very dim after resume from suspend

I'm unable to resume from 'Suspend to RAM'. It resumes properly, albeit with a very very dim screen (so dim I can barely make out the desktop). Trying to brighten the screen using the Fn keys doesn't work, and the only option is to switch the machine off and on. I'm running Bodhi Linux 2.3 with onboard Intel graphics. I think the driver being used is i915, according to lsmod, but I could be wrong. Output of uname -a and lsb-release -a: > Linux bodhiman 3.8.0-12-generic #21 SMP Tue Mar 12 17:39:30 CDT 2013 x86_64 86_64 x86_64 GNU/Linux > > Distributor ID: Ubuntu Description: Bodhi 2.3.0 Release: 12.04 Codename: precise What can I do to diagnose this and fix it?