647436 - Text in edit fields looks crapped (perforated) when caret is moved

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Andrey Upadyshev]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Firefox 4.0

In case of moving the caret in edit field, text looks **** (see attached screenshot). After rerendering (after some delay) it becomes as it should.

Reproducible: Always

Steps to Reproduce:
1. Open near the any web-site with edit field (I've used Facebook).
2. Enter any text and in any edit field.
3. Move the caret thru the text with left/right keys.
Actual Results:  
Caret is moved but every letter when the caret was became **** (perforated). (See attached screenshot)

After some time (2-10 seconds), the whole edit field is rerendered and text becomes to look as it should.



Expected Results:  
Caret is moved and text looks unchanged.

It looks like the delay of edit field rerendering is depends on current PC loading, so on fast computer the bug could be hard to be observed. But on my Pentium-D 3.0 GHz with 4 Gb RAM it is observed as well.

Comment 1

[Andrey Upadyshev]

Attachment: Crapped text in edit field

Comment 2

[Mats Palmgren (inactive)]

Andrey, does the problem also occur in Firefox Safe Mode?
http://support.mozilla.com/en-US/kb/safe%20mode#w_how-to-start-firefox-in-safe-mode
(do NOT click on the checkboxes, just "Continue in Safe Mode")

Comment 3

[Andrey Upadyshev]

Mats, I'm sorry for confusing but I've upgraded my video drivers to the latest ones from the Nvidia site and the issue has fixed.

Before filling the issue I've done the Microsoft's 'update drivers' action and it said that there is no update. But then I manually download the Nvidia drivers, install it with clear installation flag and the issue was resolved.

So I'm a lucky guy: I can use Firefox 4 at last =)