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Old 05-11-2019, 02:50 AM   #1
Registered: Oct 2016
Distribution: FreeDOS 1.2
Posts: 244

Rep: Reputation: 67
Kernel switch on -current => USB audio issues.

Due to a recent video card purchase, I've had to switch to -current (newer Mesa, X11, & LLVM). It turns out, I also need to use a 4.20 or 5.0 series kernel, or the amdgpu driver won't load at all.

The problem is, ever since switching to -current, I'm getting some USB audio glitches. Like the sound gets garbled momentarily every few minutes or so. The most visible complaint is Firefox emitting this:
Decode error: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005)
mozilla::MediaSourceTrackDemuxer::DoGetSamples(int32_t): manager is detached.
The glitch happens in any multimedia player, not just Firefox. Actually, the stock huge kernel is sort of usable (other than X running on the VESA driver, lol), and the issue gets much worse with a kernel switch. I compile the newer kernels with the config-generic from /boot, and select defaults on all new options.

I've tried the pure-alsa-system mod, but ALSA won't even try to output audio through a (class compliant) USB interface for some reason. So I can't even confirm if this is Pulseaudio related or not.

Any suggestions are welcome.

EDIT: Were the stock kernels compiled with GCC 9.1? I'm getting a large number of compile warnings during the kernel build. I wonder if the new GCC might be causing some subtle breakage.

Last edited by Fat_Elvis; 05-11-2019 at 04:18 AM.
Old 05-11-2019, 10:27 AM   #2
Registered: Oct 2016
Distribution: FreeDOS 1.2
Posts: 244

Original Poster
Rep: Reputation: 67
Ok, so removing some extraneous USB devices seems to have solved the issue for now. Interestingly, this never happened with Slackware 14.2 with a 4.19 kernel. I guess something changed regarding USB handling in either the kernel, or slackware64-current.

Anyways, marking this as solved.


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