Bug 216675

Summary:	Regression: Roland STUDIO-CAPTURE no longer registers
Product:	Drivers	Reporter:	Casey Tucker (dctucker)
Component:	Sound(ALSA)	Assignee:	Jaroslav Kysela (perex)
Status:	RESOLVED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	tiwai
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	6.0.3	Subsystem:
Regression:	Yes	Bisected commit-id:

Description Casey Tucker 2022-11-09 20:09:22 UTC

After updating kernel to latest, my Roland audio device no longer shows up in aplay -l or cat /proc/asound/cards.

I'm running Arch Linux. The last known good kernel was 6.0.2-arch1, and I was able to determine by booting a couple of virtual machines in qemu that an upstream patch shipped in 6.0.3-arch3 refactors card registration, and effectively breaks initialization of this device.

Patch: https://lore.kernel.org/all/20220904161247.16461-1-tiwai@suse.de/

I will be looking at this later this evening attempting to implement a fix that doesn't depend on reverting this patch, and may update this bug report with more details.

Comment 1 Takashi Iwai 2022-11-10 06:12:53 UTC

Hopefully it's the same issue that has been fixed recently.  Could you try the patch?
  https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?id=971cb608d1c5d95533a43b549bb8ec9637f10043

If this doesn't work, please give alsa-info.sh output.  Run the script with --no-upload option and attach the output to Bugzilla.  Also, lsusb -vv output for the device, too.

Comment 2 Casey Tucker 2022-11-10 08:14:31 UTC

I've tested this patch against 6.0.3 and 6.0.7 and they are both able to arecord -D hw:STUDIOCAPTURE -r 96000 -f S32_LE -c 18
Thanks!