[alsa-devel] PATCH - MIDI on ice1724 - real-time kernel problem SOLVED(?)
m_a_krueger at gmx.de
Mon May 26 12:54:32 CEST 2008
Pavel Hofman wrote:
> Martin Krüger wrote:
>> Pavel Hofman wrote:
>> thanks a lot for taking care for that issue.
>> I just tried it out by modifying the following files from the 2.6.26-rc3 kernel:
>> sound/pci/Kconfig (modified by hand)
>> sound/pci/ice1712/ice1712.h (modified by hand)
>> sound/pci/ice1712/envy24ht.h (modified by hand)
>> sound/pci/ice1712/ice1724.c (copied from the actual Git snapshot)
>> I double-checked all the handmade changes, should be ok.
>> Midi in via "amidi -p hw:0 -d" works now without problem,
>> but when trying to write to the device, for example by "amidi -p hw:0 -s txdata.syx"
>> it causes an immediate crash.
>> That would not be a problem for me, but jackd probes all ports, and is unusable now.
>> Perhaps i forgot a patch, is the output working for you?
> Hello Martin,
> I did check the MIDI output using command
> amidi -p hw:0 -S F0411042110C000000000074FF0411042110C000000
> Ubuntu Studio 7.10, both -generic and -rt kernel, Audiotrak Prodigy 192,
> the original patch (I assume the current git version is identical).
> There was no MIDI device connected to the output as I have none.
> I traced if MIDI-out on Juli goes through the Xilinx CPLD, and it seemed
> the MIDI lines go straight to the connectors, just as on my Prodigy 192.
> Unfortunately, I do not have Juli available any more to test the patch.
> Please could you provide more details about the crash?
> Alsa-devel mailing list
> Alsa-devel at alsa-project.org
i just compiled a new 22.214.171.124 kernel with realtime support. the kernel
is from kernel.org, so without any patches except the realtime patch
from the alsa wiki.
The alsa source i use is the actual daily snapshot, compiled with
./configure --with-isapnp=no --with-sequencer=yes --with-oss=no
This version should have the patches applied, i think.
amidi -l gives the following output:
Dir Device Name
IO hw:0,0 ICE1724 MIDI
, and as written above, amidi -p hw:0 -d works without any problems.
The fault appears immediately after trying to write anything to the
amidi -p hw:0 -S F0411042110C000000000074FF0411042110C000000
also produces a complete freeze of the system.
No matter, if my keyboard is attached or not.
That was the first time i compiled alsa with the debugging enabled, and
i am currently trying to find out how to use is to give you more
information. Is there anything else i can help? I tried to trace myself
through the source code, but my knowledge about the used api is very weak...
Thanks much for your help,
More information about the Alsa-devel