Video performance drop in Ludic Lynx

[angry_norwegian]

I was quite happy with the lucid upgrade from karmic, until I tried watching videos. They play normally in windowed mode, but in fullscreen it starts to jitter and lag with fps around 1 or even lower.

This happens on all video formats in any program I've tried. Youtube, Vimeo, VLC playing local files in different formats, you name it, I can't play it.
Also, it happened on two quite different computers too: One is a five year old stationary Pentium4 3.0 GHz with Ati HD2400 gfx, the other's a 6 month old Intel Core 2 Duo laptop with a GeForce G 105M.

Downgrading to 9.10 solved the problem, but 9.10 has other problems I'd like to get rid of.
I've googled my eyes out without finding a relevant hit.

So is there some way I can identify the problem with videos in 10.04, and resolve them? I'd be happy to provide more information if that helps.

[tgalati4]

Lucid has a PAE-enabled kernel so the 32-bit version can see more RAM. This might affect RAM handling speed. Watching fullscreen videos can be RAM intensive.

I presume that you are running 32-bit on your machines.

What were the problems in Karmic?

[angry_norwegian]

Yes, I'm on 32-bit machines.

Can I disable PAE?

The problems in Karmic is that side-scrolling isn't working on my thinkpad, that window buttons in gnome-panel sometimes becomes unresponsive, and that for some reason indicator-applet lost its shutdown/sleep/hibernate options. Plus some other few quirks I've forgotten.

[tgalati4]

I don't think there is a simple switch to turn off PAE. You need to recompile the kernel without PAE. I'm just guessing. I have Jaunty on my thinkpad t43p. I've decided to wait until others get beat up by Lucid.

And they have.

What is side scrolling? My edge scrolling works. My two-finger scrolling works. You can simply add the on/off button to the panel: right-click on a blank spot on the panel and "Add to Panel". Unresponsive window buttons could be lack of RAM on a slower machine. There are some tweaks to improve it, but you really need to max out RAM first.

[angry_norwegian]

Side scrolling is using trackpoint + middle button to scroll horizontally. gpointing-device-setting gives me vertscroll.

I tried running with the 9.10-kernel on the server, but it still was quite laggy. Installing xubuntu 9.10 gave me the same performance I used to have, so I'll stick with that.

On my laptop I'll try xubuntu 10.04, too see if it's the kernel or desktop that bogs down video.

[Amael]

Hello,

same problem here : since I installed the new Lucid Lynx I have noticed a video performance drop when I'm playing fullscreen videos (VLC, totem, ...).
I have an Ati video chipset :

amael@amserv:~$ cat /var/log/Xorg.0.log | grep Chipset
(--) RADEON(0): Chipset: "ATI Radeon XPRESS 200 5974 (PCIE)" (ChipID = 0x5974)
amael@amserv:~$ lspci -nn | grep VGA
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS482 [Radeon Xpress 200] [1002:5974]
amael@amserv:~$ glxinfo |grep vendor
server glx vendor string: SGI
client glx vendor string: Mesa Project and SGI
OpenGL vendor string: DRI R300 Project
amael@amserv:~$

Edit : Just found the solution !

I installed the ATI fglrx driver using command-line (not proposed in the proprietary hardware drivers), and now my problem is solved !

sudo apt-get install fglrx

Hope this will help you too.