Overture Crash with loss of mouse control after 5-10 minutes

[dwankan]

CPU: AMD 1.86 Ghz Core 2 Duo
RAM: 938 Mb
OS: Ubuntu 9.04, i686
Video: GeForce 7025 / NVIDIA nForce 630a

I've searched and found several comments on Overture crashing, but they all seem to be related to specific moments in the game, like moving to a new level or going through a door. Mine is different. I can get about five to ten minutes into it and it crashes no matter where I am. It has happened in that first room, in the snow banks where you have to pick up the rock, and in the underground storage room, which is as far as I've made it so far. The game freezes, minimizes, and I lose all control of my mouse, even outside the game. The only option is then to completely restart my computer manually.
All of my drivers are up to date, I have the latest version of the game, and I've even tried the http://www.unbirthgame.com/Penumbra.zip fix per the forum, but I didn't have the Penumbra.exe within the folder that that post said I should replace, so that seemed to be a waste of my time.

Here is what the hpl.log said--I hope maybe it really is something as simple as a missing image file like the error at the end might suggest. I'm not well-versed in software, which might explain why I haven't found a solution yet, but I wouldn't have thought I would have to work so much on a program I paid for. I expect a lot of glitches from free, open source stuff, but I want to play the game; it seems like it might be a lot of fun, so I'll give it a little more effort, I guess.

-------- THE HPL ENGINE LOG ------------

Creating Engine Modules
--------------------------------------------------------
Creating graphics module
Creating system module
Creating resource module
Creating input module
Creating sound module
Creating physics module
Creating ai module
Creating gui module
Creating haptic module
Creating scene module
--------------------------------------------------------

Initializing Resources Module
--------------------------------------------------------
Creating resource managers
Misc Creation
--------------------------------------------------------

Initializing Graphics Module
--------------------------------------------------------
Init low level graphics
Setting video mode: 1440 x 900 - 32 bpp
Init Glee...OK
Setting up OpenGL
Max texture image units: 16
Max texture coord units: 8
Two sided stencil: 1
Vertex Buffer Object: 1
Anisotropic filtering: 1
Max Anisotropic degree: 16
Multisampling: 1
Vertex Program: 1
Fragment Program: 1
NV Register Combiners: 1
NV Register Combiners Stages: 8
ATI Fragment Shader: 0
Creating graphic systems
Creating Renderer2D
Renderer2D created
Creating Renderer3D
Load Renderer3D gpu programs:
Extrude
CG: 'ShadowExtrude_vp.cg' using profile: 'vp40'
CG: 'ShadowExtrude_fp.cg' using profile: 'fp40'
Diffuse Vertex
CG: 'Diffuse_Color_vp.cg' using profile: 'vp40'
Diffuse Fragment
CG: 'Diffuse_Color_fp.cg' using profile: 'fp40'
Fog
CG: 'Fog_Solid_vp.cg' using profile: 'vp40'
CG: 'Fog_Solid_fp.cg' using profile: 'fp40'
Creating fog textures: Solid Additive Alpha
CG: 'refract_vp.cg' using profile: 'vp40'
CG: 'refract_fp.cg' using profile: 'fp40'
CG: 'refract_special_fp.cg' using profile: 'fp40'
init sky box
Renderer3D created
Creating screen buffers size 1440.000000 : 900.000000
Creating programs
CG: 'PostEffect_Blur_vp.cg' using profile: 'vp40'
CG: 'PostEffect_Blur_Rect_fp.cg' using profile: 'fp40'
CG: 'PostEffect_Blur_2D_fp.cg' using profile: 'fp40'
CG: 'PostEffect_Bloom_vp.cg' using profile: 'vp40'
CG: 'PostEffect_Bloom_fp.cg' using profile: 'fp40'
CG: 'PostEffect_Motion_vp.cg' using profile: 'vp40'
CG: 'PostEffect_Motion_fp.cg' using profile: 'fp40'
CG: 'PostEffect_DoF_vp.cg' using profile: 'vp40'
CG: 'PostEffect_DoF_fp.cg' using profile: 'fp40'
RendererPostEffects created
Adding engine materials
--------------------------------------------------------

Initializing Sound Module
--------------------------------------------------------
Initializing OpenAL.
Trying to open audio device... Success!
Device name: ALSA Software on default
Number of mono sources: 32
Vendor name: OpenAL Community
Renderer: OpenAL Soft
OpenAL Version Supported: 1.1
EFX: 0
Output Devices:
ALSA Software on default
ALSA Software on HDA NVidia [ALC888 Analog]
ALSA Software on HDA NVidia [ALC888 Digital]
OSS Software
Wave File Writer
--------------------------------------------------------

Initializing Game Module
--------------------------------------------------------
Adding engine updates
Initializing script functions
--------------------------------------------------------

User Initialization
--------------------------------------------------------
WARNING: Language entry 'EventKeyInNoPower' in category '01_10_small_shaft' already exists!
Initializing Penumbra: Overture
Version $Rev: 3013 $
Date $Date: 2010-02-06 22:45:08 +0000 $
Checking Supported Profiles
Profile CG_PROFILE_VP20 is supported
Profile CG_PROFILE_FP20 is supported
Profile CG_PROFILE_VP30 is supported
Profile CG_PROFILE_FP30 is supported
Profile CG_PROFILE_VP40 is supported
Profile CG_PROFILE_FP40 is supported
Profile CG_PROFILE_ARBVP1 is supported
Profile CG_PROFILE_ARBFP1 is supported
Profile CG_PROFILE_GLSLV is supported
Profile CG_PROFILE_GLSLF is supported
Profile CG_PROFILE_GLSLC is supported
Trying to load vertex program!
CG: 'Test' using profile: 'vp40'
Success!
CG: 'DiffuseSpec_Light_vp.cg' using profile: 'vp40'
CG: 'DiffuseSpec_Light_Spot_vp.cg' using profile: 'vp40'
CG: 'BumpSpec_Light_fp.cg' using profile: 'fp40'
CG: 'BumpSpec_Light_Spot_fp.cg' using profile: 'fp40'
CG: 'Ambient_Color_fp.cg' using profile: 'fp40'
--------------------------------------------------------

Game Running
--------------------------------------------------------
Loading collada for 'maps/level01_02_mine_entrance.dae' took: 611 ms
CG: 'BumpColorSpec_Light_fp.cg' using profile: 'fp40'
CG: 'BumpColorSpec_Light_Spot_fp.cg' using profile: 'fp40'
CG: 'Fog_Trans_vp.cg' using profile: 'vp40'
CG: 'Fog_Trans_Alpha_fp.cg' using profile: 'fp40'
CG: 'Diffuse_Light_vp.cg' using profile: 'vp40'
CG: 'Diffuse_Light_Spot_vp.cg' using profile: 'vp40'
CG: 'Bump_Light_fp.cg' using profile: 'fp40'
CG: 'Bump_Light_Spot_fp.cg' using profile: 'fp40'
CG: 'Diffuse_Light_fp.cg' using profile: 'fp40'
CG: 'Diffuse_Light_Spot_fp.cg' using profile: 'fp40'
CG: 'Fog_Trans_Mod_fp.cg' using profile: 'fp40'
ERROR: Couldn't find particle system file 'particle_dust.ps'
ERROR: Couldn't create particle system 'sust01' of type 'particle_dust'
ERROR: Couldn't find particle system file 'dust_sust01.ps'
ERROR: Couldn't create particle system 'particle' of type 'dust_sust01'
ERROR: Couldn't load particle system 'particle' with type 'dust_sust01'