Watching video content on any website (YouTube, news sites, TV sites etc) the picture is slow/choppy, not at all smooth. The sound is fine. I'm mainly using Chrome, which has the latest Flash enabled. The same issue occurs in Firefox.
When I use Chrome (synched) in my XP partition all video is good and plays normally.
I'm on a Dell 620M with Intel Core 2, 1.83GHz, Ubuntu 14.04 (new user of Linux); 2GB memory, 66GB Ubuntu partition. Driver in Ubuntu is Nouveau display from X.Org (should I change to a Nvidia driver as they're the ones offered in the additional driver list?). CPU runs high since installing Ubuntu, around 50-60% for both processors; in XP it's very low, ~0-5%, even with several Chrome tabs open as well as IE.
At some stage the video on Chrome (on Ubuntu system) started working normally, but I'd tried so many things recommended all over the place that I had no idea what had solved the issue, and it didn't seem to matter given that it was working. Then after booting the next day the issue reappeared. At no stage has the choppiness of videos on Firefox improved. YouTube videos are using HTML, and are choppy also.
I've tried doing most of the things I remember doing yesterday: enabling and disabling Flash, clearing cache, reopening browsers, disabling hardware acceleration (not an option anymore), installed
hal already, reinstalled ubuntu-restricted extras. (I'm unable to find what websites I visited yesterday as I deleted my browsing history.)
I'm unable to watch protected content on Chrome in spite of trying various fixes. I can watch it in Firefox but it's choppy.
Thank you very much for any suggestions (especially simple or detailed ones).
Update: I've switched to the recommended proprietary driver, Nvidia 304, but there's no improvement in video playing or the overall slowness of my machine with Ubuntu.
I don't know what this means, below, but does it offer any insight as to why my machine is running slow and videos playing laggy?
~$ /usr/lib/nux/unity_support_test -p Xlib: extension "NV-GLX" missing on display ":0". OpenGL vendor string: nouveau OpenGL renderer string: Gallium 0.4 on NV46 OpenGL version string: 1.4 (2.1 Mesa 10.1.3) Not software rendered: yes Not blacklisted: no GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: no GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: no