Windows 10 no sound for 2nd user to log in
User 1 logs in to Windows, runs Firefox, does not log out, locks Windows. User 2 logs in to Windows. Windows sound does not work in ANY application *except* for the sample played when changing the volume. No sound is available through the HDMI port, or the onboard sound chip. User 1 unlocks session and closes Firefox, then locks again. User 2 unlocks session and sound is working normally on all devices and applications.
This scenario happens regularly but not all the time. I believe Firefox is using hardware acceleration and might not be releasing its sound resources.
Latest Windows 10 version updated the Realtek driver, but the driver only affects the Realtek outputs, not HDMI which is also affected.
Chosen solution
Thanks, yes it's definitely hardware related, and it's possible with software (e.g. a web browser that plays sounds) to control the hardware. It may be coincidence that Firefox happens to be the trigger, so will close it. Life's too short.
Your answer is not clear in a couple of places: 1. browser is software, not sure what 'software issue isn't a Browser problem' means. 2. Rebooting Windows (in any mode) automatically fixes the problem 100% of the time.
I believe it's possible when the PC wakes from sleep, Firefox might be locking a device in a disconnected session - of course it could be the OS and Firefox is doing nothing wrong - closing Firefox in the other session solves it, but I'm not getting many opportunities to prove it or try other solutions.
Therefore the issue is closed.
Update: Problem is with Windows 10's latest update, not Firefox. Just switching from one user profile to another solves the problem, Firefox involvement was just a coincidence.
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Sounds hardware or software issue isn't a Browser problem but software install or corruption. Did you boot Windows into "Safe mode with Networking" to verify the problem wasn't the O/S itself? When there is no sounds that is hardware issue or software driver problem.
Chosen Solution
Thanks, yes it's definitely hardware related, and it's possible with software (e.g. a web browser that plays sounds) to control the hardware. It may be coincidence that Firefox happens to be the trigger, so will close it. Life's too short.
Your answer is not clear in a couple of places: 1. browser is software, not sure what 'software issue isn't a Browser problem' means. 2. Rebooting Windows (in any mode) automatically fixes the problem 100% of the time.
I believe it's possible when the PC wakes from sleep, Firefox might be locking a device in a disconnected session - of course it could be the OS and Firefox is doing nothing wrong - closing Firefox in the other session solves it, but I'm not getting many opportunities to prove it or try other solutions.
Therefore the issue is closed.
Update: Problem is with Windows 10's latest update, not Firefox. Just switching from one user profile to another solves the problem, Firefox involvement was just a coincidence.
Modified by rob-j