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