Forums » Bugs

Linux OpenGL 4 lighting artifacts

Dec 18, 2014 cellsafemode link
I can take video of the effect when I get off work if that would help. I haven't read anywhere of any hangs related to that extension in general. I suppose we could answer the question if _anyone_ else in linux land uses fglrx rather than the open source driver and still experiences the stutter or not. Or any other driver.
Dec 18, 2014 mr_spuck link
I see some weird bright spots on rocks.
At first I thought it was due to the weapon fire from the hive or some dropped loot, but it's static and later on I got the same thing in a sector without hive.

It's with a Radeon HD5670 and current Mesa.

I've been getting stalls recently too, even with the old GL driver. Could be that somethings wrong with my setup though.

Just tried it with onboard graphics (Radeon HD3200) With everything set to medium I get impressive 10fps at the login screen! The chip only supports GL 3.3 so it's neat that it runs at all.
Dec 23, 2014 abortretryfail link
That looks like stuck lights from the jump-in animations. I was seeing a lot of that in a hive central skirmish too where all the bots jumped in near a roid.

RS780s are pretty weaksauce. Did you make sure to set the CPU governor to Performance?
Dec 23, 2014 mr_spuck link
Could be. The spot that I saw in another sector may have been something else.

Dunno.. with catalyst the onboard chip used to run the game okish (with aa and glow disabled though). I don't remember if the performance gov was enabled but it didn't make noticable difference before. Radeontop also reported that chip was totally maxed out.

I went back to catalyst now. I had some anoying pm issues with the mesa driver anyway and performance is way better.

Maybe the GALLIUM_HUD variable could be useful for getting some information about those freezes? It draws some pretty graphs onto the screen.
Dec 31, 2014 cellsafemode link
Jan 01, 2015 abortretryfail link
That's what mine does too. If you have /fps and /toggleframerategraph on, it sticks out like a sore thumb.
Jan 02, 2015 vskye link
I just checked this last night and my system doesn't have these issues. You guys using Nvidia or AMD for the GPU?
Jan 02, 2015 cellsafemode link
We're using Mesa's GL utilizing the open source drivers. Both using radeon cards.

you have to make sure also when testing the new renderer to switch it and exit the client and restart. Live switching between gl4 and the reference one yields visual artifacts and issues not indicative of how the renderer behaves when you do a fresh start with it already set.
Jan 02, 2015 vskye link
Shrugs. I'm using a Nvida card and not seeing any issues at this time. I am running the game in a window at 1440x900 if that matters. (monitor res is 2560x1440)
Feb 05, 2015 abortretryfail link
Looks like the stuttering is a kernel bug: