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#1 2013-09-07 20:50:31

sollidsnake
Member
Registered: 2012-01-30
Posts: 107

[SOLVED] Black dots glitches in Firefox

Hi all!
When I scroll web pages in Firefox I'm presented with black dots that multiply themselves as I keep scrolling. They go away if I refresh the page or scroll faster.

Here's a "screenshoot"
http://cdn.imghack.se/images/58eae51879 … ac5ca0.jpg

My laptop is hybrid with Intel and NVidia video cards. What I have already tried:

- Disabling composition and changing the WM
- Using NVidia card instead of Intel
- Updating system
- Using a Aurora and Nightly versions of FF
- Launching Firefox with a brand new user

None of those seemed to help. I got no more ideas. Can someone help?
Thank you in advance. smile

Last edited by sollidsnake (2013-09-07 22:03:50)


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#2 2013-09-07 20:55:41

jasonwryan
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From: .nz
Registered: 2009-05-09
Posts: 29,068
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Re: [SOLVED] Black dots glitches in Firefox


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#3 2013-09-07 22:03:31

sollidsnake
Member
Registered: 2012-01-30
Posts: 107

Re: [SOLVED] Black dots glitches in Firefox

You're right. It only happens under sna method. Changing to uxa fixes it, but makes Firefox slower. But knowing what exactly was the problem, I got it fixed under sna by installing xf86-video-intel-git from AUR. Thank you.

Last edited by sollidsnake (2013-09-07 22:05:47)


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#4 2013-09-09 01:04:07

cfr
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From: Cymru
Registered: 2011-11-27
Posts: 6,104

Re: [SOLVED] Black dots glitches in Firefox

So why did you still see the problem when using the nvidia card, do you think?


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#5 2013-09-09 01:18:57

sollidsnake
Member
Registered: 2012-01-30
Posts: 107

Re: [SOLVED] Black dots glitches in Firefox

cfr wrote:

So why did you still see the problem when using the nvidia card, do you think?

I ran Firefox using optirun. So I think it's probably because using optirun results in a different performance than when running the entire Xorg under NVidia.


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#6 2013-09-09 20:50:54

ssri
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Registered: 2010-02-16
Posts: 216

Re: [SOLVED] Black dots glitches in Firefox

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#7 2013-09-11 03:46:34

b4nst0n
Member
Registered: 2013-08-08
Posts: 50

Re: [SOLVED] Black dots glitches in Firefox

This driver now uses SNA as the default acceleration method. You can still fall back to UXA if you run into trouble. To do so, save a file with the following content as /etc/X11/xorg.conf.d/20-intel.conf :
      Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
        Option      "AccelMethod"  "uxa"
      EndSection

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