There there little retarded child. What you do is erase that nasty virus you have installed and install an "operating system" or OS, like windows xp, and all your troubles will go away.

*pats on head a little too many times*

Linux troubleshooting:

Step 1: Check to see if you have Linux installed. If yes, proceed to Step 2. If no, proceed to Step 3.

Step 2: Uninstall Linux and completely reformat your hard drive.

Step 3: Install either Windows or Mac OS.

A lot of other users are having the exact same problem. You might have to wait it out for an update.

Check out forums via Google.

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/314928

Maybe they can offer a solution.

^Thanks for that info. At least I know it's nothing I did wrong. All other video files on my PC play great. Thank god I transferred all my porn videos over.

Chances are Ubuntu has just installed a non accelerated X server for your video card. Depends on your video chipset, you might need to change the /etc/X11/xorg.conf manually. I use debian, so can't help you much on the gui side of things.

Did you install 9.04/"Jaunty"? If so, you can try enableing UXA acceleration, see the release notes on the ubuntu website.

Other than that, can you notice any harddisk activity when the flash player stutters? There are some known offenders that cause audio stutter, but I'd have to research them since it's been years that I've been plagued by stutter.

^Remember, you gotta speak to me like I'm a retarded, lead-paint-chip eating child.

I'll give it a try. And by "try", I mean point and click til I'm forced to use the keyboard out of frustration.

I am. You don't want to hear me when I think you're a competent human being. Marketing people run away screaming. But they do that anyway.

If you're stuck anywhere, just give a holler and I'll see what I can do.

Do you use Opera of Firefox? Or something else entirely (freak!) ? I have had some trouble with flash video in Opera on my 64bit Ubuntu 8.10, but it works fine in Firefox for me.

I tried an old version of Ubuntu on my Thinkpad and it was ok. Just couldn't get the wireless working. Hope they've sorted that by now.

Just realised I have nothing useful to contribute. I just like typing.

Hmm, just reread your original post. The UXA stuff is currently only relevant for intel GPUs, so scrap that since you're nvidia.

Did you install the proprietary nvidia driver? If not, do so and try again.

Steriodg is correct. When you install Ubuntuu it does not have the proprietary drivers enabled that allows you to have video acceleration. The best way to know is if you have really choppy video. You should go to the System menu > Administration > Hardware Drivers to view the video drivers. You should be able to see a video card listed or at least detected. You should click on it then click on the Activate button. A progress bar should appear and once it's done you will need to reboot. After that it should be done.

^I just checked there and it actually does have the nVidia accelerated graphics driver installed. I bought the computer from Dell with everything fully configured. I think Llama might be right about there being a bug with Ubuntu. Thanks for the suggestion though.

And Ornthoron, thanks for the suggestion too, but I have both Firefox and Opera installed, and the problem occurs on both of them.

Are you experiencing stutter with other apps? Playing mp3s for e.g.

Kind of a bit of a cop out answer, but if you're struggling and want to do something (possibly) more straightforward then you could install Mint Linux. It's a version of Linux based on Ubuntu.
It seems to be more "works out of the box" than ordinary ubuntu.
You see a lot of the stuff like Java plugins, proprietary drivers and flash (basically often the non-open-source stuff) aren't all that straightforward to enable on ordinary Ubuntu, but seem to work much more smoothly on Mint.

I personally use Ubuntu, but I put Mint on anyone's PC who doesn't want to get into all the technical stuff too much.

I really enjoy Linux and think it's a great thing, and find it strange when people don't like something that people give away for free, but I can see why other people don't want the hassle.

The only thing with Linux, is that it often is possible to solve the problems, but it quite often will end up with typing in commands, but as the years go by, each new version seems to mean you have to do less of that typing to make it do the common stuff.

There's no getting around it at the moment, if you want to use Linux to do all the other stuff you want to do on your other OSes, then you will have to occasionally do some slightly technical stuff and learning. But there's lots of people perfectly happy to help out with your struggles. Sometimes it may seem like a pain, but there are also a lot of rewards along the way. It's a whole new community to get involved in and find out about, and you'll benefit greatly by embracing what you can do that you can't do with Windows or a Mac, and accepting some things will at least for the time being be easier to do on a PC/Mac.

Also if you've still not solved the problem then it may be as simple as enabling proprietary drivers.
System > Administration > Software Sources > Ubuntu Software

check Proprietary drivers and
software restricted by copyright issues