Open Bug 1679573 Opened 2 months ago Updated 11 days ago

Hang bug when re-entering session with Remote Desktop

Categories

(Core :: Graphics, defect)

Firefox 83
Desktop
Windows
defect

Tracking

()

UNCONFIRMED
Tracking Status
firefox83 --- affected

People

(Reporter: mozilla, Unassigned, NeedInfo)

Details

Attachments

(1 file)

60.93 KB, application/json
Details

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:83.0) Gecko/20100101 Firefox/83.0

Steps to reproduce:

Run Firefox normally (Windows 10). Lock screen. Re-enter Windows session with Remote Desktop.

Actual results:

Firefox hangs and requires End Task.

Expected results:

Nothing: Firefox should pick up where you left off, like any other GUI task.

If you start a new PID of Firefox over Remote Desktop, everything is fine. You can exit RDP and re-enter, or you can exit and continue session at the terminal. But if you start the executable at the terminal and attempt to use it over RDP, Firefox hangs.

What kind of remote session do you use? Windows's Remote Desktop Connection feature?
Does it matter what kind of content you have loaded in the firefox browser or does it ALWAYS hang?
Does it ONLY hand when unlocking over remote? (there are some other issues related to browser hanging after screen unlock)

Thanks.

Flags: needinfo?(mozilla)

Yes, Windows Remote Desktop.

The content does not matter; the exe hangs regardless of tabs, content, etc.

It only happens when (a) the instance is started at the terminal, (b) the screen is locked, (c) the session is unlocked and entered using Remote Desktop.

Flags: needinfo?(mozilla)

I can't reproduce this issue on my systems; Seems like a Graphics bug. Please set a more appropriate component if this one isn't correct.

Let me write my steps to reproduce and you can correct me if you're doing something different:

  1. Allow Remote Desktop Connection on a system connected to the same network with Windows 10.
  2. Open Firefox Release v83.0 from Command Prompt (Terminal).
  3. Lock Screen.
  4. On another Windows 10 system from the same network, connect to the first Windows 10 system using Remote Desktop Connection.
    The issue reproduces: Firefox hangs.
    The issue does not reproduce: Firefox runs normally after connecting via Remote Desktop Connection.

Can you answer a few questions:

  1. Are my steps correct?
  2. Does this issue still reproduce?
  3. Is it constant? Happens every time?
  4. What Graphics card are you using on the system that you are connecting to?
  5. Are you sure that Remote Desktop Connection causes this issue? What makes you believe that?
Component: Untriaged → Graphics
OS: Unspecified → Windows
Product: Firefox → Core
Hardware: Unspecified → Desktop
See Also: → 1506017

This is not Linux/Nvidia.

See Also: 1506017

Can you please attach a copy of your about:support information?

Can you try disabling hardware acceleration and checking if the issue still reproduces?

Do you know whether this is a long-standing issue, or has it only started to occur recently? If recently, would you be able to use mozregression to find out what caused the issue?

Thanks!

Severity: -- → S3
Flags: needinfo?(mozilla)
Attached file about:support

The about:support blob, as requested

Can you please attach a copy of your about:support information?
Done.

Can you try disabling hardware acceleration and checking if the issue still reproduces?
Unfortunately, it still occurs with Hardware Acceleration turned off.

Do you know whether this is a long-standing issue...?
I believe this is a relatively new issue, perhaps a year old. More information: when Firefox hangs, it does not come back to life when the main desktop is re-entered. Once the hang occurs, the task is non-responsive and requires an end-task.

...would you be able to use mozregression to find out what caused the issue?
Stay tuned to this channel.

mmmann, there are many questions you haven't answered. They may help us address it further. I would do it myself, but I can't seem to reproduce it.

If you could answer my questions, I would do my best to reproduce it:
Are my steps correct?
Does this issue still reproduce?
Is it constant? Happens every time?
Are you sure that Remote Desktop Connection causes this issue? What makes you believe that?

Otherwise, you could help us investigate by anwsering Jamie Nicol's questions:
Can you try disabling hardware acceleration and checking if the issue still reproduces?
Do you know whether this is a long-standing issue, or has it only started to occur recently? If recently, would you be able to use mozregression to find out what caused the issue?

Thanks!

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