Many games perform sluggishly after waking PC from suspend (Ubuntu 12.04)

[N]

I'm not sure who to report this to. I've already tried reporting it to Nvidia, but haven't heard any response. It could be a general Linux issue. Or maybe it's something particular to my hardware setup. Anyway, I'll voice it here since it strikes me as the next step.

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. 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.

Note that while the aforementioned games run sluggishly, the Ubuntu 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 Ubuntu versions, as I aim on continuing to game on this OS.

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

Thank you.

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

[Ubuntu Foundations Team Bug Bot (crichton)]

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[N (sunnybubblegum)]

Hi,

The issue is now resolved, at least for me.

I recently upgraded my graphics card to an Nvidia GeForce GTX 750 Ti, and with it am using the Nvidia proprietary driver, version 340.96.

I've tested nearly all of those same games after a wake from suspend, and am seeing no drops in frame rates or input latency. (Frame rates are staying usually above 60 FPS, and often up into the 100s or 200s.) Maybe this issue was addressed on Nvidia's end in driver updates since then.

I've also transitioned to Ubuntu 14.04, if that makes any difference.

Anyway, there's no clear option to mark this as issue as Solved, so I'll mark it as Confirmed. But it can be considered solved and cleared.

System information:
Ubuntu 14.04.4 (64-bit)
Asus M4A78LT-M LE Motherboard
AMD Athlon II X4 645, 3.10 GHz
Mushkin 8GB PC3 Blackline RAM (2 x 4GB)
500GB Western Digital Hard Disk
Nvidia GeForce GTX 750 Ti 2GB GDDR5
Nvidia Driver Version 340.96