[alsa-devel] 2.6.26.[6|7] vs. rt11 vs. alsa (usb) midi
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
-- Fernando
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
Takashi
Hi
On Mon, 27 Oct 2008 09:13:29 +0100 Takashi Iwai tiwai@suse.de wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I have a lot of problems in kernel versions greater than 2.6.26.3-rt3, but I think is not ALSA related ....
Josep
On Mon, 2008-10-27 at 09:13 +0100, Takashi Iwai wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I just tested an RME PCMCIA card + Multiface interface and it shows the same problem. No MIDI messages get through (but the LED in the Multiface blinks). Same hardware booted into 2.6.24.7-rt21 works fine.
-- Fernando
At Tue, 28 Oct 2008 14:35:55 -0700, Fernando Lopez-Lezcano wrote:
On Mon, 2008-10-27 at 09:13 +0100, Takashi Iwai wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I just tested an RME PCMCIA card + Multiface interface and it shows the same problem. No MIDI messages get through (but the LED in the Multiface blinks). Same hardware booted into 2.6.24.7-rt21 works fine.
Then this should be in RT side. There is no fundamental change regarding rawmidi since some time ago...
Takashi
On Wed, 2008-10-29 at 12:10 +0100, Takashi Iwai wrote:
At Tue, 28 Oct 2008 14:35:55 -0700, Fernando Lopez-Lezcano wrote:
On Mon, 2008-10-27 at 09:13 +0100, Takashi Iwai wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
(but on Fedora 9 I get X segfaults with it... so not really usable either)
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I just tested an RME PCMCIA card + Multiface interface and it shows the same problem. No MIDI messages get through (but the LED in the Multiface blinks). Same hardware booted into 2.6.24.7-rt21 works fine.
Then this should be in RT side. There is no fundamental change regarding rawmidi since some time ago...
Hmm, why do you say rawmidi? This is happening with the sequencer interface, AFAIK.
I just tested this with the rawmidi.c test program that comes with alsa and the rawmidi interface _is_ working ("rawmidi -v -i hw:1,0" outputs the raw bytes being received).
Now I start qjackctl to patch the sequencer output of the P250 to kmidimon and I get just one "active sensing" message in the messages window of kmidimon. This is what I see in the proc/asound/seq/clients file:
---- $ cat /proc/asound/seq/clients Client info cur clients : 6 peak clients : 6 max clients : 192
Client 0 : "System" [Kernel] Port 0 : "Timer" (Rwe-) Port 1 : "Announce" (R-e-) Connecting To: 15:0, 128:0, 129:0 Client 14 : "Midi Through" [Kernel] Port 0 : "Midi Through Port-0" (RWe-) Client 15 : "OSS sequencer" [Kernel] Port 0 : "Receiver" (-we-) Connected From: 0:1 Client 20 : "P-250" [Kernel] Port 0 : "P-250 MIDI 1" (RWeX) Connecting To: 129:0 Port 1 : "P-250 MIDI 2" (-We-) Client 128 : "Client-128" [User] Port 0 : "qjackctl" (-W--) Connected From: 0:1 Input pool : Pool size : 200 Cells in use : 0 Peak cells in use : 3 Alloc success : 5 Alloc failures : 0 Client 129 : "KMidimon" [User] Port 0 : "input" (-We-) Connected From: 0:1, 20:0 Output pool : Pool size : 500 Cells in use : 0 Peak cells in use : 0 Alloc success : 0 Alloc failures : 0 Input pool : Pool size : 200 Cells in use : 0 Peak cells in use : 2 Alloc success : 4 Alloc failures : 0 ----
Now I quit kmidimon...
---- $ cat /proc/asound/seq/clients ----
Hangs! Can't ctrl-c out of it. Kmidimon is (sort of) still around:
---- nando 7696 0.3 0.0 0 0 ? Zl 22:41 0:01 [kmidimon] <defunct> ----
Rawmidi does not work anymore, of course, hangs and can't be ctrl'c'ed either. Everything that touches midi seems to hang waiting for something that is never going to happen. And this only appears to happen when I try to use the sequencer api. Before that the rawmidi program happily prints midi bytes as they arrive.
Maybe this points to a possible culprit? Any more data I could provide that would be useful? Any help in debugging this would be appreciated. At this point no realtime kernel is usable for the tasks I need it for.
-- Fernando
At Sun, 02 Nov 2008 22:52:11 -0800, Fernando Lopez-Lezcano wrote:
On Wed, 2008-10-29 at 12:10 +0100, Takashi Iwai wrote:
At Tue, 28 Oct 2008 14:35:55 -0700, Fernando Lopez-Lezcano wrote:
On Mon, 2008-10-27 at 09:13 +0100, Takashi Iwai wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
(but on Fedora 9 I get X segfaults with it... so not really usable either)
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I just tested an RME PCMCIA card + Multiface interface and it shows the same problem. No MIDI messages get through (but the LED in the Multiface blinks). Same hardware booted into 2.6.24.7-rt21 works fine.
Then this should be in RT side. There is no fundamental change regarding rawmidi since some time ago...
Hmm, why do you say rawmidi? This is happening with the sequencer interface, AFAIK.
Hmm, it's not impossible, if it's relevant with a timer interface, although the sequencer core part has been fundamentally unchanged for ages.
For sequencer issues, you can sort out by using it without rawmidi interface. For example, start aseqdump program in alsa-utils, and send to that port via aplaymidi.
Takashi
On Wed, 2008-11-05 at 08:43 +0100, Takashi Iwai wrote:
At Sun, 02 Nov 2008 22:52:11 -0800, Fernando Lopez-Lezcano wrote:
On Wed, 2008-10-29 at 12:10 +0100, Takashi Iwai wrote:
At Tue, 28 Oct 2008 14:35:55 -0700, Fernando Lopez-Lezcano wrote:
On Mon, 2008-10-27 at 09:13 +0100, Takashi Iwai wrote:
At Sat, 25 Oct 2008 19:46:27 -0700, Fernando Lopez-Lezcano wrote:
Hi... anyone out there also having problem with this combination? 2.6.26.7 or 2.6.26.6 with 2.6.26.6-rt11 and alsa MIDI It looks to me like alsa midi is broken.
Probably an interaction with the realtime kernel patch. A Fedora kernel based on 2.6.26.6 (2.6.26.6-49 on fc8) works fine, a very similarly patched kernel that includes the realtime patch does not. The configurations for both are almost the same (today I tried to change some of the most obvious differences and rebuild, with the same result).
No problems with 2.6.24.7-rt21.
(but on Fedora 9 I get X segfaults with it... so not really usable either)
Test: boot, login, plugin an external usb keyboard (Yamaha P250), it is recognized, use qjackctl alsa patchbay to connect it to kmidimon, kmidimon sees only _one_ midi message and that's it. Kmidimon can't be killed after that.
What about other MIDI devices on other bus, e.g. an MPU401 on a PCI soundcard or so? There is a possibility of breakage in the USB driver side, too.
I just tested an RME PCMCIA card + Multiface interface and it shows the same problem. No MIDI messages get through (but the LED in the Multiface blinks). Same hardware booted into 2.6.24.7-rt21 works fine.
Then this should be in RT side. There is no fundamental change regarding rawmidi since some time ago...
Hmm, why do you say rawmidi? This is happening with the sequencer interface, AFAIK.
Hmm, it's not impossible, if it's relevant with a timer interface, although the sequencer core part has been fundamentally unchanged for ages.
For sequencer issues, you can sort out by using it without rawmidi interface. For example, start aseqdump program in alsa-utils, and send to that port via aplaymidi.
The sequencer interface works fine (AFAICT) when not touching external ports.
The rawmidi interface seems to work separately. The sequencer interface (internal) seems to work. The whole thing hangs when connecting an external port (rawmidi, I guess) to internal stuff.
Any kernel gurus that could help? Takashi: where in the *.c files should I start looking? I guess I could try to start sprinkling printk's or whatever there and see where the heck this is hanging.
-- Fernando
participants (3)
-
Fernando Lopez-Lezcano -
Josep Andreu -
Takashi Iwai