PROBLEM: Many games perform sluggishly after waking PC from suspend

[Nicholas A]

Hello,

I'm not sure who to report this to. I've already tried reporting it to
Nvidia, but haven't heard any response. I also submitted it to
Ubuntu's bug tracker. However, it occurred to me that it could be a
general Linux issue. Anyway, I'll voice it here since it strikes me as
the next step.

Sorry I'm not following the prescribed bug reporting format. I'm not a
developer, or very technical. I'm just a general end user who found a
problem. Here is the issue.

All of my Steam games run at great frame rates normally. However, upon
waking my PC from a suspend, many of them perform sluggishly until my
next reboot. It's like their frame rate gets cut in half. They're
still playable, but not very enjoyably so. Some of these games (played
through Steam) include Awesomenauts, Left 4 Dead 2, Dota 2,
Counter-Strike: Source, Half-Life 2, Portal, Portal 2 and Team
Fortress 2.

However, some games continue to work just fine after a suspend. For
example, Killing Floor. I know it uses the Unreal 3 engine, and
perhaps it is optimized better for Linux. Also Nexuiz and Xonotic
continue to work well after a wake from suspend.

While the aforementioned games run sluggishly, the desktop still
performs as snappy and responsive as before. It seems unaffected by
the problem. The issue is only noticeable in games.

I hope this will be addressed in future Linux versions, as I would
like to continue gaming on this OS.

If this has already been addressed in newer versions, please excuse this.

Thank you, and take care.

System Information:
Ubuntu 12.04.5 LTS (64-bit)
Asus M4A78LT-M LE Motherboard
AMD Athlon II X4 645, 3.10 GHz
Mushkin 8GB PC3 Blackline RAM (2x 4GB)
500 GB Hard Disk
Nvidia GeForce GT 240
Nvidia Driver Version 331.113
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