912480 - Text Turns Blue During Vertical Scrolling

Status: UNCONFIRMED

(Core :: Graphics: Text, defect)

Description

[jonc]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0 (Beta/Release)
Build ID: 20130803192641

Steps to reproduce:

1. Install Firefox 23.0 on Ubuntu and Ubuntu derivatives.

2. Scroll vertically, either direction.




Actual results:

Body text -- standard 16pt text and smaller -- turns blue while the display is being scrolled.

Text returns to black instantly when scrolling stops.

Disabling "Smooth Scrolling" corrects this.  Toggling "Hardware Acceleration" has no impact.

Hardware:  ThinkPad W530 with Nvidia K1000M 2-gig video and onboard Intel.  Problem persists when BIOS is set for discrete card, Optimus, or Nvidia-only with Nvidia driver.



Expected results:

Text should not turn blue when the page is scrolled.

Comment 1

[Tiziana Sellitto [:tiziana]]

Thanks for taking the time to report this! 
Could you attach a screenshot of the problem?

Does the problem happen if you start Firefox in Safe Mode? See http://support.mozilla.com/en-US/kb/Safe+Mode

Comment 2

[jonc]

The text needs to be moving, so no screenshot.

Yes, it persists in Safe Mode with smooth scrolling enabled.

Comment 3

[Manuela Muntean [Away]]

Do you also reproduce this with a clean profile: http://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles ?

After you update your Flash and GPU driver, the problem still persists?

Comment 4

[jonc]

I'll try a clean profile when I have time to figure out how to save and restore my current profile.

However, the blue text appears on first use of Firefox on a newly installed system.  I've checked.  In Fedora 19, as well.

Flash is 11,2,202,297.  The graphics driver is whatever is current in Ubuntu 13.04 w/3.8.0.30. (On Fedora, it was also present using an Nvidia driver. I haven't intalled Nvidia on Ubuntu here.)

Comment 5

[Wayne Mery (:wsmwk)]

jonc, Do you still see this when using a current version?