The "rawmidi drain error" went away. Now if I start and shut down jackd nothing bad happens. But when I launch Rosegarden there are several lines containing the following new message:
[ 455.025168] ALSA /home/marco/build/linux-2.6.24-19-rt/alsa-1.0.17/driver-patched/alsa-driver-1.0.17/usb/caiaq/../../alsa-kernel/usb/caiaq/caiaq-midi.c:84: snd-usb-caiaq log: snd_usb_caiaq_midi_send(f76a5ac0): usb_submit_urb() failed, -22
Furthermore the first time I rebooted my system, it freezed during the startup procedure (loading hardware drivers), but it didn't happen again.
Marco
2009/1/7 Takashi Iwai tiwai@suse.de
At Wed, 7 Jan 2009 16:41:21 +0100, Marco Santamaria wrote:
I applied the patch (or I think so...). I just removed the line:
dev->midi_out_substream = NULL;
from the function snd_usb_caiaq_midi_output_done in the file
caiaq-midi.c.
Then I recompiled the driver.
The main issue is sorted out: I can start and shut down jackd without big problems.
But with dmesg I still have the following message:
ALSA /home/marco/build/linux-2.6.24-19-rt/alsa-1.0.17/driver-patched/ alsa-driver-1.0.17/acore/rawmidi.c:196: rawmidi drain error (avail =
4095,
buffer_size = 4096)
Not sure if it is safe to ignore it.
Hmm, what about the patch below?
Takashi
diff --git a/sound/usb/caiaq/caiaq-midi.c b/sound/usb/caiaq/caiaq-midi.c index 30b57f9..9557635 100644 --- a/sound/usb/caiaq/caiaq-midi.c +++ b/sound/usb/caiaq/caiaq-midi.c @@ -69,7 +69,8 @@ static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *dev,
dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE; dev->midi_out_buf[1] = 0; /* port */
len = snd_rawmidi_transmit_peek(substream, dev->midi_out_buf+3,EP1_BUFSIZE-3);
len = snd_rawmidi_transmit(substream, dev->midi_out_buf + 3,EP1_BUFSIZE - 3); if (len <= 0) return;@@ -87,16 +88,12 @@ static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *subs { struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
if (dev->midi_out_substream != NULL)return;if (!up) {
if (up) {dev->midi_out_substream = substream;snd_usb_caiaq_midi_send(dev, substream);} else { dev->midi_out_substream = NULL;
return; }dev->midi_out_substream = substream;snd_usb_caiaq_midi_send(dev, substream);}
@@ -169,8 +166,6 @@ void snd_usb_caiaq_midi_output_done(struct urb* urb) if (!dev->midi_out_substream) return;
snd_rawmidi_transmit_ack(dev->midi_out_substream, buf[2]);dev->midi_out_substream = NULL; snd_usb_caiaq_midi_send(dev, dev->midi_out_substream);}