[gentoo-user] re: scrolling not seamless in firefox/thunderbird

[gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Alexander Kapshuk]

I've noticed that when I am scrolling up/down a page in Firefox, or
scrolling up/down an email body in Thunderbird, it's not seamless. Not
sure how to best describe what I mean by 'not seamless'. It's kind of
wavy. The text is.

Is this kind of behaviour a result of something missing in the kernel
I'm using, or in the graphics driver, or something else.

Here's some details about my system setup.

box0=; uname -a
Linux box0 3.10.7-gentoo #4 SMP Mon Sep 9 21:53:26 EEST 2013 i686
Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz GenuineIntel GNU/Linux

box0 ~ # lspci|grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation G98M [GeForce G
103M] (rev a1)

box0=; equery list x11-drivers/nvidia-drivers
 * Searching for nvidia-drivers in x11-drivers ...
[IP-] [  ] x11-drivers/nvidia-drivers-319.49:0

box0=; lsmod|grep nvidia
nvidia               8473585  32

box0=; equery list '*firefox*'
 * Searching for *firefox* ...
[IP-] [  ] www-client/firefox-17.0.8:0

box0=; equery list '*thunderbird*'
 * Searching for *thunderbird* ...
[IP-] [  ] mail-client/thunderbird-17.0.8:0

Thanks.
 

Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Al]

Alexander Kapshuk wrote:
> I've noticed that when I am scrolling up/down a page in Firefox, or
> scrolling up/down an email body in Thunderbird, it's not seamless. Not
> sure how to best describe what I mean by 'not seamless'. It's kind of
> wavy. The text is.

Uncheck "Use smooth scrolling" in preferences/advanced/general and the 
wavy line will go away.

Al

Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Bruce Hill]

On Sat, Sep 21, 2013 at 08:03:10AM -0700, Al wrote:
> Alexander Kapshuk wrote:
> > I've noticed that when I am scrolling up/down a page in Firefox, or
> > scrolling up/down an email body in Thunderbird, it's not seamless. Not
> > sure how to best describe what I mean by 'not seamless'. It's kind of
> > wavy. The text is.
> 
> Uncheck "Use smooth scrolling" in preferences/advanced/general and the 
> wavy line will go away.

I have "Use smooth scrolling" checked and no such wavy line anywhere.
-- 
Happy Penguin Computers               >')
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A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

Don't top-post: http://en.wikipedia.org/wiki/Top_post#Top-posting

Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Al]

Bruce Hill wrote:
> I have "Use smooth scrolling" checked and no such wavy line anywhere.

Hmmm....

I just tried Firefox, and get the wavy line when "Use smooth scolling is 
checked (scrolling with the mouse wheel). It goes away when unchecked.

Did the same in Thunderbird, and I don't see the wavy line, no matter 
what the setting.

Al

Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Alexander Kapshuk]

On 09/21/2013 06:32 PM, Al wrote:
> Bruce Hill wrote:
>> I have "Use smooth scrolling" checked and no such wavy line anywhere.
>
> Hmmm....
>
> I just tried Firefox, and get the wavy line when "Use smooth scolling
> is checked (scrolling with the mouse wheel). It goes away when unchecked.
>
> Did the same in Thunderbird, and I don't see the wavy line, no matter
> what the setting.
>
> Al
>
>
Having the "Use smooth scrolling" option unchecked in both Firefox and
Thunderbird seems to have fixed the 'wavy line' problem for me.

Thanks.

Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Joakim Gebart]

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2013/9/22 Alexander Kapshuk <alexander.kapshuk@gmail.com>

> On 09/21/2013 06:32 PM, Al wrote:
> > Bruce Hill wrote:
> >> I have "Use smooth scrolling" checked and no such wavy line anywhere.
> >
> > Hmmm....
> >
> > I just tried Firefox, and get the wavy line when "Use smooth scolling
> > is checked (scrolling with the mouse wheel). It goes away when unchecked.
> >
> > Did the same in Thunderbird, and I don't see the wavy line, no matter
> > what the setting.
> >
> > Al
> >
> >
> Having the "Use smooth scrolling" option unchecked in both Firefox and
> Thunderbird seems to have fixed the 'wavy line' problem for me.
>
> Thanks.
>
>
> I'm guessing the wavy line that you describe is 'tearing' that appears
when the display is not synced to the framebuffer, i.e. "vsync". I believe
some of the graphics drivers are not even capable of vsync currently in
X11, but I'm not certain.

/JG

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Re: [gentoo-user] re: scrolling not seamless in firefox/thunderbird

[Alexander Kapshuk]

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On 09/23/2013 11:46 AM, Joakim Gebart wrote:
> 2013/9/22 Alexander Kapshuk <alexander.kapshuk@gmail.com 
> <mailto:alexander.kapshuk@gmail.com>>
>
>     On 09/21/2013 06:32 PM, Al wrote:
>     > Bruce Hill wrote:
>     >> I have "Use smooth scrolling" checked and no such wavy line
>     anywhere.
>     >
>     > Hmmm....
>     >
>     > I just tried Firefox, and get the wavy line when "Use smooth
>     scolling
>     > is checked (scrolling with the mouse wheel). It goes away when
>     unchecked.
>     >
>     > Did the same in Thunderbird, and I don't see the wavy line, no
>     matter
>     > what the setting.
>     >
>     > Al
>     >
>     >
>     Having the "Use smooth scrolling" option unchecked in both Firefox and
>     Thunderbird seems to have fixed the 'wavy line' problem for me.
>
>     Thanks.
>
>
> I'm guessing the wavy line that you describe is 'tearing' that appears 
> when the display is not synced to the framebuffer, i.e. "vsync". I 
> believe some of the graphics drivers are not even capable of vsync 
> currently in X11, but I'm not certain.
>
> /JG
That sounds right. I just wasn't sure how to best put it into technical 
terms.

Thanks.


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[gentoo-user] Re: scrolling not seamless in firefox/thunderbird

[Nikos Chantziaras]

On 21/09/13 15:39, Alexander Kapshuk wrote:
> I've noticed that when I am scrolling up/down a page in Firefox, or
> scrolling up/down an email body in Thunderbird, it's not seamless. Not
> sure how to best describe what I mean by 'not seamless'.

A screenshot would speak a thousand words :-)