594901 - Opening firefox via remote desktop while another use is using it locally (on another account)

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[jonnyblazersp]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.9) Gecko/20100824 Firefox/3.6.9 GTB7.1
Build Identifier: http://download.mozilla.org/?product=firefox-4.0b5&os=win&lang=en-US

If I open firefox via RDP while another use is using it locally but on a different account the screen is not displayed. 

My guess is that it has to do with the acceleration that was just enabled in 4B5 as I didn't have this problem in earlier versions.

Reproducible: Always

Steps to Reproduce:
1.One person use firefox locally
2.Log in to the same pc via remote desktop on a different account than step1
3.Open Firefox
Actual Results:  
all you see are the edges of the window.

Expected Results:  
firefox should have opened normally

if the person closes FF or i end their task the problem goes away.

Comment 1

[phi2x]

I confirm this bug with the latest build. 
It's even worse than described because the bug is also there when accessing with RDP the same account that is in current use locally.

My tests showed that this bug is rooted in hardware acceleration support in Firefox. 
It seems that Firefox doesn't identify changes in display and stays in hardware accelerated mode when accessed via the remote desktop. And then displays only black instead of content.

The only solution is then to close Firefox and open it up again so that it switch to software rendering.

Comment 2

[Wayne Mery (:wsmwk)]

jonny, phi2x 

do you still see this issue??
I use remote desktop a lot, sometimes as described, and don't see this

Comment 3

[Firefox Bug Husbandry Bot]

2019-03-06

This bug is part of a group of bugs which have had an open needinfo for at least 12 weeks.

The request for information has not been answered, and we can't move forward on the bug so we are closing it.

If the defect is still present, please reopen this bug with an updated report.