Linux: Visual stuttering/framedrop when Steam Overlay shows a notification

[Cybolic]

I just got my first inventory item from Super Meat Boy, but had to stop playing since the Steam Overlay popup slowed the game down to a few frames per second, making it unplayable.

Note that I'm using an NVIDIA GTX 660 Ti with the NVIDIA drivers, so the GPU shouldn't be the issue.

[icculus]

Someone reported this in Bugzilla, too, but it's worth noting that this is either a driver bug, an X server bug, or a Steam Overlay bug. There's literally no Overlay code in Super Meat Boy; Steam hooks into the process when you launch it to do the Overlay magic.

Does this happen with any other games?

[Cybolic]

I've seen some flickering in some other game, but I can't remember which one; I haven't seen this kind of slow-down before though.
I'm running Unity, which often does weird things to 3D, so that might be part of the issue.

On a more personal note, thank you for all your porting and toolset work through the years; if I had an award to give, you'd get one :)

[Klogg]

I just want to say that I have GTX 650 Ti Boost with nVidia drivers and I have no issues with steam overlay. Game is running perfectly fine. I am using elementaryOS so it could be that Unity is the problem? I know it's 3d heavy...