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Old 05-21-09, 04:21 PM   #1
timothius
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Default Scrolling explanation please

Hi All,

I was browsing Wolfram Alpha today and noticed that scrolling is horribly slow in firefox.

http://www.wolframalpha.com/

I'm on Ubuntu Intrepid running on a Dell M1330 with an 8400Gs.

Scrolling the same site is smoother when using an Windows Xp virtual machine and internet explorer 8!

I'm just wondering why scrolling in Linux is so terrible in general. Is it a driver issue or an Xorg issue?

Thanks,

T
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Old 05-21-09, 05:47 PM   #2
thefirstm
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Default Re: Scrolling explanation please

Same issue here with an 8600m GT and 185.18.10. All other sites scroll just fine, though. In fact, they scroll very fast.
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Old 05-21-09, 09:08 PM   #3
hyfans
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Default Re: Scrolling explanation please

you mean this page?

http://www.wolframalpha.com/examples/Math.html

i has NO scrolling problem here, its scrolling is even faster than nvnews( in this post).
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Old 05-21-09, 09:09 PM   #4
hyfans
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Default Re: Scrolling explanation please

debian/sid+185.18.10+no composite+swiftfox 3.0.11Pre+amdx2 3200+8500GT
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Old 05-22-09, 12:27 AM   #5
clarious
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Default Re: Scrolling explanation please

Quote:
Originally Posted by hyfans View Post
you mean this page?

http://www.wolframalpha.com/examples/Math.html

i has NO scrolling problem here, its scrolling is even faster than nvnews( in this post).
No, the front page.
I also has the same problem with 8600M + 180.18.10, will test with 6600 when I get home.

It is due to the frame in the middle, I am not an expert in this matter but maybe the reason is too many small picture?
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Old 05-22-09, 03:28 AM   #6
thefirstm
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Default Re: Scrolling explanation please

It looks to me like the page is trying to do some sort of compositing or transparency. This is probably what is slowing it down.
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Old 05-22-09, 09:12 AM   #7
clarious
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Default Re: Scrolling explanation please

Tested with 6600GT: Smooth as silk. Looking at your card, I think this is the same performance bug of 8000 series (and above?)
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Old 05-22-09, 11:25 AM   #8
apaige
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Default Re: Scrolling explanation please

Scrolling on this page (which has a fixed background) used to be very slow on the 8xxx cards; recent drivers fixed that problem.

Now the Wolfram|Alpha result pages are very slow. I guess something on them isn't handled by the driver. Then again, before blaming NVIDIA, I'd like to know why the hell every piece of textual content is presented as a freakin' image, and why displaying any result at all requires javascript to be enabled.
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Old 05-22-09, 11:09 PM   #9
hyfans
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Default Re: Scrolling explanation please

apaige, i tried the Wolfram's page as well as the tuxfamily page you mentioned above again.

i still have SMOOTH scrolling on them

btw, maybe because i have fix background workaround in my usercontent.css?

/* Smooth Scrolling Workaround: Disable Fixed Background Images on Pages */
body {
background-attachment: scroll !important;
}
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Old 05-22-09, 11:50 PM   #10
apaige
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Default Re: Scrolling explanation please

Quote:
Originally Posted by hyfans View Post
i still have SMOOTH scrolling on them
btw, maybe because i have fix background workaround in my usercontent.css?
Yup, that's why.
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Old 05-23-09, 12:07 AM   #11
ledoc
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Default Re: Scrolling explanation please

Wow that wolfram page is real slow (G84/180.44). And, I get hissing noises from my board/GPU. yikes.
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