Zandronum OpenGL runs slow as treacle

[Guest Unregistered account]

^ Title. If I try to run Zandronum in OpenGL, it runs so. Very. Slow. It takes about five seconds to load a frame.

My laptop appears to have similar problems running games (I have another post here about how Doom 64 EX becomes so slow that it crashes if the screen-bleed effect is triggered, and I recently installed Banned Memories - a Gamemaker game - and in that game's case, the game itself seems to run slowly as well as the framerate).

 

The strange thing is, I was able to play through all of Unloved in GZDoom with consistently good performance (apart from in some of the larger arenas), dynamic lights and all.

I'm not sure what's going on, but if anyone would be able to help, here's my laptop specs (according to the label on it):

Intel Core i3-2328M (2.2GHz, 3MB L3 cache)

Intel HD Graphics 3000, up to 1760 MB Dynamic Video Memory

15.6" HD (1366x768) LED LCD

4GB DDR3 Memory

500 HB HDD

DVD-Super Multi DL drive

Acer Nplify 802.11b/g/n

6-cell Li-ion battery

Not sure if this is still a thread that belongs in the "Source ports" subforum...

[BadLuckBurt]

Taking a stab in the dark here but maybe the Intel Graphics is not 'dynamically' using more memory in Zandronum and that Gamemaker game. Can you force a memory setting for the GPU anywhere?