Closed Bug 723524 Opened 8 years ago Closed 8 years ago

If css opacity is toggled, the element fades to black instead of transparent.

Categories

(Firefox :: Untriaged, defect)

10 Branch
x86
Windows XP
defect
Not set

Tracking

()

RESOLVED DUPLICATE of bug 723484

People

(Reporter: lb, Unassigned)

Details

(Keywords: css2)

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0) Gecko/20100101 Firefox/10.0
Build ID: 20120129021758

Steps to reproduce:

I set up a page with an image element in it. Through css I specified that the image should fade to opacity 0.2 on hover: img:hover {opacity: 0.2;}



Actual results:

When hovering the mouse over the image, the image fades to black, and switches to 0.2 Tranparency after a short moment.


Expected results:

The image shoul've faded to transparent instead.
Keywords: css2
The testcase works fine for me with Seamonkey trunk and FF10.0 on win7/32.
Please test again in the Firefox safemode
http://support.mozilla.com/en-US/kb/Safe+Mode
It sounds like an issue with the HWA in Firefox. Try with the HWA disabled (Options > Advanced > General) in FF10 and make another try.
I came a bit closer to a solution.

First, here are screenshots of what happens: http://imgur.com/a/rMw1k/embed

The problem appears not to be related to hwa, since turning it of the issue remained unchanged.
After starting FF in -safe-mode, I couldn't reproduce the problem, it all worked as desired. Strange enough, it still works after closing FF -safe-mode and restarting it again in standard mode.

Could this be related to the adblock plus plugin probably?
(In reply to lb from comment #4)
> The problem appears not to be related to hwa, since turning it of the issue
> remained unchanged.
When you disable HWA in Firefox options, you need to restart Firefox to apply the change.

> After starting FF in -safe-mode, I couldn't reproduce the problem, it all
> worked as desired.
Starting Firefox in safe mode disables HWA.

I'm pretty sure if you restart Firefox in normal mode with HWA disabled, opacity will work as expected. Make a try.
This looks like a dupe of bug 723484.
Could you please copy+paste the graphic section from about:support ?
duping to bug 723484.
Please post the graphic card and driver version from about:support to bug 723484
Status: UNCONFIRMED → RESOLVED
Closed: 8 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 723484
Issue appears to be gone after restarting FF once without hwa, either in -safe-mode or manually toggled off.

graphics card: ATI Radeon HD 5700 Series
Vendor-ID: 1002
device id: 68b8
device RAM: Unknown
device driver: ati2dvag
driver version: 8.771.0.0
driver date: 8-25-2010
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