mfsoa wrote: > Hi Everyone, > > Excuse the linux-idiot question but how do I enable max_usb_current=1 > when using piCorePlayer? > > Can I just pop it into a Tweaks/User command field? My SSH skills are > woefully limited! > > The long story: In troubleshooting the random continuous loud hiss issue > I've been documenting here, I tried a few different power supplies for > the Pi. I was convinced that I was not having power issues into the > Marantz SA8005 dac but got three different yet reproducible results w/ > three power supplies: > > 1) Jerome linear supply, rated 5V, 3A: Works well, dac always locks > onto incoming sample rate but I get the occasional hissing fit every few > hours. Power cycling the dac restores the music to its former glory. > 2) CanaKit wall wart rated 5V, 2.5A: Dac will lock onto incoming sample > rate, but not play music. Then it loses the lock and displays "USB > Unlock" then locks again. Cycle repeats and no music ever plays. > 3) Front USB jack on a Rotel RDD-1580 dac, rated 5V, 2.1A. Marantz > never locks onto incoming sample rate. > > So perhaps the Marantz is very sensitive to the incoming power, or maybe > my particular Pi (Model 2 B) is not quite putting out 5V via USB. There > is nothing else hooked up via USB on the Pi. > > Therefore I'm thinking if I up the output current to 1.2A then maybe > it'll make a better connection to the dac - a stiffer supply that'll > keep the voltage up. I blocked the 5V bus power on a USB cable and the > dac did not lock on USB at all, so I'm not sure if it needs it to > handshake only or if the USB needs the 5V power. Perhaps a powered USB > hub between the Pi and dac might help... > > Thanks again for your input and great software. > -Mike
Mike, try this, it might not work as piCore is a bit different. This is for windows Take your sd card and put it into a card reader. Open the card and look for the boot.config file. Open the file and add max_usb_current=1 to the end of the file. Save and close, remove the usb reader in the proper manner and you should be good to go. Ronnie. I don't have a player in front of me at the moment to check, but this is the simple way way I do it when I burn a new image for raspbian etc, as the card is already in the computer. ------------------------------------------------------------------------ Man in a van's Profile: http://forums.slimdevices.com/member.php?userid=43627 View this thread: http://forums.slimdevices.com/showthread.php?t=97803 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
