651490 - Jumpy/slow scrolling on second screen when docked with Lenovo T410

Status: RESOLVED DUPLICATE of bug 633904

(Core :: Graphics, defect)

Description

[Paul Sanders]

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0) Gecko/20100101 Firefox/4.0

I have a Lenovo T410. With it docked I have the laptop screen as my main screen and the screen extended to a second monitor. When Firefox is on the second monitor the scrolling becomes jerkey and slow. If I move Firefox to the laptop window the problem isn't there. I have tried other programs (Chrome, IE etc.) and none of them have this problem. I have just moved to the Lenovo and was using a Dell Latitude before with the same setup but no problem with the screen so it seems to be specific to the Lenovo. The problem is present both with smooth scrolling turned on and off.

Reproducible: Always

Steps to Reproduce:
1. Open Firefox
2. Put Firefox on the "extended desktop"
3. Scroll on the page
Actual Results:  
Jerkey slow scrolling

Expected Results:  
No delay in the scrolling

Comment 1

[Wesley]

I am having the same issue with the same setup.  It only occurs on the secondary extended monitor, not the primary T410 monitor.  Additionally I experience a brief pause with the mouse when a piece of JavaScript runs (i.e. mouse overs and mouse outs).

Comment 2

[(mostly gone) XtC4UaLL [:xtc4uall]]

Is the Issue reproducible in Safe-Mode for you guys?
https://support.mozilla.com/en-US/kb/Safe+Mode

Comment 3

[George Carstoiu]

Mozilla/5.0 (Windows NT 5.1; rv:6.0a1) Gecko/20110420 Firefox/6.0a1

Please try a clean profile also:
http://support.mozilla.com/en-US/kb/Managing%20profiles

Could it be related to hardware acceleration? Try disabling it and see whether you can still reproduce the issue.

Comment 4

[Paul Sanders]

The problem is not there in Safe-Mode. I haven't installed any extensions yet so that isn't the problem. I tried to go through and disable plugins (flash, etc) one by one but the problem was still there with everything disabled when not in Safe-Mode.

Comment 5

[Paul Sanders]

I tried a clean profile and turning off hardware acceleration but neither made any difference.

Comment 6

[(mostly gone) XtC4UaLL [:xtc4uall]]

(In reply to comment #5)
> I tried a clean profile and turning off hardware acceleration but neither
> made any difference.

Did you restart Firefox when disabling Hardware Accel.?

Comment 7

[Paul Sanders]

(In reply to comment #6)
> (In reply to comment #5)
> > I tried a clean profile and turning off hardware acceleration but neither
> > made any difference.
> 
> Did you restart Firefox when disabling Hardware Accel.?

I thought I had, but apparently not. I just tried again and turning off hardware acceleration stopped the problem.

Comment 8

[(mostly gone) XtC4UaLL [:xtc4uall]]

Ok, thanks. Looks like another "docked Monitor + HWA Usage" Issue.

Paul, please post the Content of the Graphics Section you can get via "about:support" after you re-enabled Hardware Acceleration.

Comment 9

[Paul Sanders]

Here is the graphics info.

Adapter Description: Intel(R) HD Graphics
Vendor ID: 8086
Device ID: 0046
Adapter RAM: Unknown
Adapter Drivers: igxprd32
Driver Version: 6.14.10.5292
Driver Date: 8-13-2010
Direct2D Enabled: false
DirectWrite Enabled: false (0.0.0.0, font cache n/a)
WebGL Renderer:Google Inc. -- ANGLE -- OpenGL ES 2.0 (ANGLE 0.0.0.611)
GPU Accelerated Windows: 1/1 Direct3D 9

Comment 10

[George K.]

I think this is a duplicate of Bug 633904 (or vice versa). Same behavior, graphics adapter, OS, and similar driver versions.