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Re: MIDIServer and machine sleep/resume stability
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Re: MIDIServer and machine sleep/resume stability


  • Subject: Re: MIDIServer and machine sleep/resume stability
  • From: Doug Wyatt <email@hidden>
  • Date: Thu, 29 Apr 2004 18:07:40 -0700

Michel,

My PowerBook G4 (10.3.3) often sleeps with up to 3 MIDI devices/drivers active (Edirol UM-880 via Apple class driver, MOTU 828mk2, M-Audio Radium 49) and I haven't seen any behavior like this in quite some time. When I did, it seemed to be caused by disconnecting USB devices while the PowerBook's lid was shut -- often, the machine would be frozen when I got to work and opened it. Being careful to disconnect USB while the machine was awake solved that. This was back on Jaguar, too.

I just tested putting my PowerBook to sleep with MIDI active and the machine was fine on wake.

Does the problem happen if the Edirol and Evolution devices are not connected? If so, does it happen if their drivers are temporarily disabled?

Doug

On Apr 29, 2004, at 17:36, Michel wrote:

MIDIserver takes seconds to launch, so I usualy keep another MIDI app open
just so it doesnt reload all the time when I develop my own applications. I
mostly use "MIDI Monitor" and keep it in the background.

However I noted that if I "forget" a MIDI app when I put the machine to sleep,
thw machine will either freeze solid when put to sleep, or on the following
wakup.
I reproduce that very easily, but I can't file a bug because the machine never
displays any kernel panic log or anything.

Note that the MIDI server worked beautifully in jaguar, that sleep
misbehaviour started with panther. It just took a long time to realise what
was happening.

The machine is 2*1.42, latest 10.3, 2GB RAM. I tested with as little as a
Edirol 8820 and an Evolution eKeys.

Michel
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References: 
 >MIDIServer and machine sleep/resume stability (From: Michel <email@hidden>)

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