* [PATCH] ALSA: usb-audio: Skip sample-rate read-back on PreSonus AudioBox USB
@ 2026-10-19 20:49 Thomas Nemer
2026-10-20 8:40 ` Takashi Iwai
0 siblings, 1 reply; 2+ messages in thread
From: Thomas Nemer @ 2026-10-19 20:49 UTC (permalink / raw)
To: tiwai, perex; +Cc: linux-sound, linux-kernel, Thomas Nemer, stable
The AudioBox USB stalls the UAC1 GET_CUR SAMPLING_FREQ request on both
streaming endpoints. After the sample rate is set, the read-back
verification in set_sample_rate_v1() fails and logs
usb 1-3.1.2: 2:1: cannot get freq at ep 0x1
usb 1-3.1.2: 3:1: cannot get freq at ep 0x82
on each endpoint configuration until the sample_rate_read_error counter
gives up. Set QUIRK_FLAG_GET_SAMPLE_RATE to skip the read-back on this
device.
Fixes: 1869c47e5d59 ("ALSA: usb-audio: Fix missing sample-rate control for PreSonus AudioBox USB")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Nemer <thomas.nemer@fortytwo.fr>
---
sound/usb/quirks.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 4ac4aef47d..43eea72477 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2731,6 +2731,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
QUIRK_FLAG_ITF_USB_DSD_DAC | QUIRK_FLAG_CTL_MSG_DELAY),
DEVICE_FLG(0x1901, 0x0191, /* GE B850V3 CP2114 audio interface */
QUIRK_FLAG_GET_SAMPLE_RATE),
+ DEVICE_FLG(0x194f, 0x0301, /* PreSonus AudioBox USB */
+ QUIRK_FLAG_GET_SAMPLE_RATE),
DEVICE_FLG(0x19f7, 0x0003, /* RODE NT-USB */
QUIRK_FLAG_MIXER_PLAYBACK_MIN_MUTE),
DEVICE_FLG(0x19f7, 0x0035, /* RODE NT-USB+ */
--
2.56.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ALSA: usb-audio: Skip sample-rate read-back on PreSonus AudioBox USB
2026-10-19 20:49 [PATCH] ALSA: usb-audio: Skip sample-rate read-back on PreSonus AudioBox USB Thomas Nemer
@ 2026-10-20 8:40 ` Takashi Iwai
0 siblings, 0 replies; 2+ messages in thread
From: Takashi Iwai @ 2026-10-20 8:40 UTC (permalink / raw)
To: Thomas Nemer; +Cc: tiwai, perex, linux-sound, linux-kernel, stable
On Mon, 19 Oct 2026 22:49:44 +0200,
Thomas Nemer wrote:
>
> The AudioBox USB stalls the UAC1 GET_CUR SAMPLING_FREQ request on both
> streaming endpoints. After the sample rate is set, the read-back
> verification in set_sample_rate_v1() fails and logs
>
> usb 1-3.1.2: 2:1: cannot get freq at ep 0x1
> usb 1-3.1.2: 3:1: cannot get freq at ep 0x82
>
> on each endpoint configuration until the sample_rate_read_error counter
> gives up. Set QUIRK_FLAG_GET_SAMPLE_RATE to skip the read-back on this
> device.
>
> Fixes: 1869c47e5d59 ("ALSA: usb-audio: Fix missing sample-rate control for PreSonus AudioBox USB")
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Thomas Nemer <thomas.nemer@fortytwo.fr>
Applied now. Thanks.
Takashi
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