I use a four year old laptop as a media center to playback movies on my TV Screen. It shows fine at the beginning, but after about 20 or 30 minutes the movie starts to stutter more and more.
I usually use the standard movie player (totem) or VLC for playback. Both show the same symptoms. When I check with top, the movie starts with VLC or totem showing around 25% CPU usage, after 20 Minutes it suddenly surges to 80%, then later to around 120% (using the second CPU), and the stuttering begins. Killing the movie player and restarting the movie does not help. I have to reboot to get again the normal performance.
As the movie plays all right for about 20 minutes, I think the hardware is generally powerful enough to do the job. I read a few threads about similar problems (but there, Xorg eats the CPU) for example here: http://www.dedoimedo.com/computers/u...in-nvidia.html , but those vblank etc. settings did not solve the problem.
Two things I have in mind that could cause this, but I'm not wise enough to narrow them down:
- thermal problem, leading to reduced speed at the graphic card, in turn increasing CPU load
- Software problem, in analogy to a memory leak a "CPU-leak" ?
- Ubuntu Precise 64 bit
- NVIDIA post-release updates driver (I changed to that one to see if it helps, but did not change anything)
- VLC or totem for movie playback
- using Xinerama to extend to both screens - I could not get the external screen working via HDMI without Xinerama.
Lenovo N500 with NVIDIA GeForce 9300M GS , using an external SAMSUNG TV via HDMI
Any help, infos, input or tests I could do are appreciated