I have had this same trouble on my iMac since the beginning... but only under Linux. It seems that the Linux driver doesn't do something that the Mac OS 9 driver does... and the result is a low hum and distortion that starts from bootup until Mac OS 9 starts to load. Under Linux, the hum never goes away.
Do you have this problem under Mac OS 9 or Mac OS X? Even booting from the System CD may be sufficient to tell. Adam On Thu, Jan 10, 2002 at 02:24:15AM +0000, William R Sowerbutts wrote: > On Thu, Jan 10, 2002 at 03:19:18AM +0100, Siggi Langauf wrote: > >> On my iBook2 (600/DVD+CDRW) I can hear a low frequency humming on > >> headphones > >> plugged into the audio jack. The hum is only there when the system is > >> plugged > >> into the mains. I live in the UK and it sounds like it's around 50Hz, which > >> would match the frequency of our AC mains supply. > >> > >> Does anyone else get this or is it just me with the dud headphones/ibook? > >> ;) > > > >I don't get this, but I'm sure it's the usual problem: you have grounded > >your iBook with more than one wire, creating a "ground loop" into which > >power supply wires can induce some current. > >Typical candidates for the second wire are your ethernet or modem cable. > >Try to unplug them (and anything else that could be connected to ground > >level), and I'm quite sure the humming will go away, even if the power > >supply is connected. > > Hmmmm. I don't think that's it -- the only cable connected to my machine is > the power cord (and the headphones). So there's only one path to ground. > Unless the wireless network counts? ;-) > > I might complain to Apple. It's quite irritating. > > _________________________________________________________________________ > William R Sowerbutts [EMAIL PROTECTED] > Coder / Guru / Nrrrd http://sowerbutts.com > main(){char*s=">#=0> [EMAIL PROTECTED]@^7=";int c=0,m;for(;c<15;c++)for > (m=-1;m<7;putchar(m++/6&c%3/2?10:s[c]-31&1<<m?42:32));} > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > >
