21 Jul
2006
21 Jul
'06
8:46 p.m.
Greetings:
I hooked up my new HP 6540 printer today, it's a beauty, but it
creates a terrible noise through my speakers when it's running. Is this
a known problem with USB devices ? Is it a mobo problem ? (This is
happening on my old 800 MHz machine.)
Short of disconnecting the cable when the printer isn't being used, is
there a solution to this trouble ?
Best,
dp
21 Jul
21 Jul
9:26 p.m.
New subject: [linux-audio-user] OT: Gear for auction
Once again, this is the group I always figure might be interested in
gear for sale:
Cassette Deck:
http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&ih=012&item=220009312628&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1
Tube Pre Amp:
http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&ih=012&item=220009710599&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1
Tone Module:
http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&ih=012&item=220009715258&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1
Drum Machine:
http://cgi.ebay.com/ws/eBayISAPI.dll?
ViewItem&ih=012&item=220009718401&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1
Cheers!
-- Aaron
10:29 p.m.
Ground loop problem? As a test only, what happens if you unplug power
on the printer, or turn the printer off?
If it is a ground loop issue - I did hear of this recently with a USB
hard drive I think - then possibly it's a cable issue or maybe you
could stuck a USB hub in the middle to break the loop? (Just
guessing!) ;-)
On the off chance it's something more nefarious, what are the relative
IRQ priorities of the USB controller vs. the sound card? I Assume the
sound card's IRQ has a high realtime priority? If not, and it's lower
than USB, then possibly there is some strange interaction. I've never
run into anything like that with USB, but I have with other devices
like a mouse, etc.
Hope this helps. (not holding my breath!) ;-)
Cheers,
Mark
On 7/21/06, Dave Phillips <dlphillips(a)woh.rr.com> wrote:
Greetings:
I hooked up my new HP 6540 printer today, it's a beauty, but it
creates a terrible noise through my speakers when it's running. Is this
a known problem with USB devices ? Is it a mobo problem ? (This is
happening on my old 800 MHz machine.)
Short of disconnecting the cable when the printer isn't being used, is
there a solution to this trouble ?
Best,
dp
22 Jul
22 Jul
9:14 a.m.
Hi Mark :
Ground loop problem? As a test only, what happens if
you unplug power
on the printer, or turn the printer off?
Same noise. It stops if I pull either the power or the USB cable.
If it is a ground loop issue - I did hear of this
recently with a USB
hard drive I think - then possibly it's a cable issue or maybe you
could stuck a USB hub in the middle to break the loop? (Just
guessing!) ;-)
I tried sticking a hub between the machine and the printer, it didn't
reduce the noise at all. :(
I'm going to visit our brand-new Wal Mart to look for a
noise-suppressive cable.
On the off chance it's something more nefarious,
what are the relative
IRQ priorities of the USB controller vs. the sound card? I Assume the
sound card's IRQ has a high realtime priority? If not, and it's lower
than USB, then possibly there is some strange interaction. I've never
run into anything like that with USB, but I have with other devices
like a mouse, etc.
Here's the output from lspci and /proc/interrupts on the offending machine :
Output from lspci:
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133]
(rev 02)
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South]
(rev 22)
00:07.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 10)
00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 10)
00:07.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 10)
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
00:10.0 Ethernet controller: Lite-On Communications Inc LNE100TX
[Linksys EtherFast 10/100] (rev 25)
00:12.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 08)
00:12.1 Input device controller: Creative Labs SB Live! MIDI/Game Port
(rev 08)
00:14.0 Multimedia audio controller: VIA Technologies Inc. ICE1712
[Envy24] PCI Multi-Channel I/O Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2
MX/MX 400] (rev b2)
Output from 'cat /proc/interrupts' :
CPU0
0: 62304648 XT-PIC timer
1: 5639 XT-PIC i8042
2: 0 XT-PIC cascade
3: 127 XT-PIC EMU10K1
5: 9043743 XT-PIC ICE1712, uhci_hcd:usb1, uhci_hcd:usb2
7: 1 XT-PIC parport0
8: 4 XT-PIC rtc
11: 63698 XT-PIC eth0
12: 537858 XT-PIC i8042
14: 46717 XT-PIC ide0
15: 23 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
I'm concerned by the USB and ICE1712 sharing the same IRQ. How do I
reassign the interrupt ?
Best,
dp
10:11 a.m.
Dave Phillips wrote:
That isn't very surprising as the ground will just
be connected through.
What you can do to test whether it is a ground loop is interrupting the
ground connection of the power plug (e.g. by wrapping some
non-conductive tape around the pin). If the noise stops, you have a
ground loop. Don't use this as a solution to your ground loop however,
as it is probably against regulations and is also pretty unsafe
regarding electric shocks.
If it is a ground loop, it is pretty difficult to solve. It's badly
designed hardware. You could try to plug your printer into the same
power outlet as the machine.
Greets,
Pieter
Hi Mark :
Is the noise only
present when printing, or also when the printer is idle?
Ground loop problem? As a test only, what happens
if you unplug power
on the printer, or turn the printer off?
Same noise. It stops if I pull either the power or the USB cable. If it is a ground loop issue - I did hear of this
recently with a USB
hard drive I think - then possibly it's a cable issue or maybe you
could stuck a USB hub in the middle to break the loop? (Just
guessing!) ;-)
I tried sticking a hub between the machine and the printer, it didn't
reduce the noise at all. :(
11:12 a.m.
Pieter Palmers wrote:
Is the noise only present when printing, or also when
the printer is
idle?
Noise is there whether the printer is turned on or not. It disappears
only when one or another of the cables are disconnected.
What you can do to test whether it is a ground loop is
interrupting
the ground connection of the power plug (e.g. by wrapping some
non-conductive tape around the pin). If the noise stops, you have a
ground loop. Don't use this as a solution to your ground loop however,
as it is probably against regulations and is also pretty unsafe
regarding electric shocks.
If it is a ground loop, it is pretty difficult to solve. It's badly
designed hardware. You could try to plug your printer into the same
power outlet as the machine.
The printer is plugged into the same strip as the machine.
I tried lifting the ground, the noise was undiminished.
Next I'll try reprioritizing the interrupts, as soon as I can get
irqtune built. Or is there other software I should try ?
Linux 2.6 kernel, Debian Etch.
Best,
dp
11:23 a.m.
On Sat, Jul 22, 2006 at 09:26:10AM -0400, Dave Phillips wrote:
Pieter Palmers wrote:
Then it's probably not related to interrupts etc.
Are you sure the ground connections of your audio cable and
amplifier are OK ?
--
FA
Follie! Follie! Delirio vano e' questo!
Is the noise only present when printing, or also
when the printer is
idle?
Noise is there whether the printer is turned on or not. It disappears
only when one or another of the cables are disconnected.
11:43 a.m.
Fons Adriaensen wrote:
Sure, they've been fine, I've had no similar trouble until I added this
printer (recommended by linuxprinting.org).
I haven't tried switching the M-Audio card slot yet, it's my next move.
Best,
dp
Noise is there
whether the printer is turned on or not. It disappears
only when one or another of the cables are disconnected.
Then it's probably not related to interrupts etc.
Are you sure the ground connections of your audio cable and
amplifier are OK ?
2:17 p.m.
On Sat, 2006-07-22 at 07:28 -0400, Dave Phillips wrote:
I'm concerned by the USB and ICE1712 sharing the
same IRQ. How do I
reassign the interrupt ?
Move the ICE1712 to a different PCI slot. I agree with FA that the
interrupts are not likely to be related to this problem, but it might
help anyway if the problem is EMI.
Lee
2:26 p.m.
Lee Revell wrote:
On Sat, 2006-07-22 at 07:28 -0400, Dave Phillips
wrote:
Thanks, Lee, I plan to do it later this afternoon. I've also ordered a
Monster USB cable made for EMI suppression, we'll see if that helps.
Best,
dp
I'm concerned by the USB and ICE1712 sharing
the same IRQ. How do I
reassign the interrupt ?
Move the ICE1712 to a different PCI slot. I agree with FA that the
interrupts are not likely to be related to this problem, but it might
help anyway if the problem is EMI.
4:19 p.m.
Greetings:
Okay, I swapped slots between the Delta 66 and my Ethernet card. My
machine wouldn't boot, no idea why, other than it's a crappy machine
that sometimes does stuff like that. So I pulled out the Delta (it's
going in the new machine anyway) and put the Ethernet card back in its
former slot. The machine booted, and 'cat /proc/interrupts' confirmed
that the soundcard (an SBLive Value) is on IRQ5 and the USB ports are on
IRQ 3. The noise from the printer is still present, but not so loud now.
Also, there's no added noise when the printer is working. Formerly it
made even more noise while printing.
Eventually I'd like to add this printer to my new box. I'm curious to
hear what happens then...
As always, muchas gracias to everyone who replied to the topic.
Best,
dp
4:55 p.m.
Greetings:
Btw, I noted that the UHCI controller for the machine is listed as USB
version 1.10, the printer is listed as version 2.0.
Is that meaningful wrt the noise coming through the speakers ?
Best,
dp
5:04 p.m.
It should not matter.
If your printer is USB 2.0 then it's able to run faster than USB 1.1.
However 2.0 devices usually work fine on 1.1 controllers by just
running as per the old spec.
Backward compatibility.
- Mark
On 7/22/06, Dave Phillips <dlphillips(a)woh.rr.com> wrote:
Greetings:
Btw, I noted that the UHCI controller for the machine is listed as USB
version 1.10, the printer is listed as version 2.0.
Is that meaningful wrt the noise coming through the speakers ?
Best,
dp
6748
days inactive
6749
days old
linux-audio-user@lists.linuxaudio.org
12 comments
6 participants
participants (6)
-
Aaron J. Trumm -
Dave Phillips -
Fons Adriaensen -
Lee Revell -
Mark Knecht -
Pieter Palmers