635939 - youtube videos not visibile, black screen, adobe flash installed

Status: RESOLVED WORKSFORME

(Core Graveyard :: Plug-ins, defect)

Description

[tilo]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13
Build Identifier: Firefox/3.6.13

on a brand new computer:
1. windows 7 professional(64 bit), Firefox 3.6.13, Adobe Flash Player 10.2.152.26, Shockwave Player installed
2. youtube videos aren´t visible: I get only a black window:
- it displays the symbol for loading the video
- the loading circle stopps, video scoll bar is moving,
- display remains black, moving circle symbols seems to dispaly a trace
3. other sides with flash videos are working (see example URL)
4. I tried Adobe Flash "Square" with no result

Reproducible: Always

Steps to Reproduce:
1. Load youtube.com
2. click on a video (any): display remains black
3. http://www.chemgapedia.de/vsengine/info/en/help/requirements/flash.html:videos are working
Actual Results:  
youtube video remains black

Expected Results:  
youtube video shall be shown/ visible

e.g.: http://www.chemgapedia.de/vsengine/info/en/help/requirements/flash.html
this flash video is working

Comment 1

[tilo]

correction to step 3.
http://www.chemgapedia.de/vsengine/info/en/help/requirements/flash.html

videos are working

Comment 2

[Ed Morley [:emorley]]

Could you see if the issue occurs with a new, empty profile:
http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_make-a-new-profile

Does closing Firefox, uninstalling Flash via the 'programs and features' control panel, then installing the latest again, help?

Comment 3

[tilo]

I will try this tomorrow afternoon. I live in europe and its now late in the evening for me.

Comment 4

[Matthias Versen [:Matti]]

You should try to install the latest graphic card driver first. Flash is using hardware acceleration. Why do you think that this is a browser bug ?
Is the same flash plugin working with other browsers ?

Comment 5

[Zio_Fede]

I've seen a lot of reports about this on forums, maybe something changed on youtube...

Comment 6

[Jim Mathies [:jimm]]

You also might try testing with an older version of flash, flash 10.2 was released recently. This might be a new flash player bug.

http://kb2.adobe.com/cps/142/tn_14266.html

Comment 7

[tilo]

First I've tried new graphic card drivers, but then during installation my computer crashed. I resetted to an earlier system restore point and tried the former flash version 10.1.102.64 (released 11/04/2010). 

And now it works!!!

Thanks a lot to everybody!

tilo