Re: Surround via SPDIF with ALSA/emu10k1?

2005-08-27 Thread Thomas Zehetbauer
I have now been told that SPDIF cannot support more than 2 channels
except with AC3 compression. Given the fact that we can send 580MBit/s
over USB2.0 I would not have even remotely considered this to be the
problem and find it an incredible shame that audio industry is using
such a crippled standard.

I have now solved my problem by buying and connecting an analog 5.1
speaker set. Unfortunately I get audible distortions when I turn both
the "PCM" and "Wave" mixers to the maximum setting. I wonder if anyone
can provide more insight what these controls really do and whether it's
better to turn down "PCM", "Wave" or both.

Tom

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Re: Surround via SPDIF with ALSA/emu10k1?

2005-08-27 Thread Thomas Zehetbauer
I have now been told that SPDIF cannot support more than 2 channels
except with AC3 compression. Given the fact that we can send 580MBit/s
over USB2.0 I would not have even remotely considered this to be the
problem and find it an incredible shame that audio industry is using
such a crippled standard.

I have now solved my problem by buying and connecting an analog 5.1
speaker set. Unfortunately I get audible distortions when I turn both
the PCM and Wave mixers to the maximum setting. I wonder if anyone
can provide more insight what these controls really do and whether it's
better to turn down PCM, Wave or both.

Tom

-- 
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Surround via SPDIF with ALSA/emu10k1?

2005-08-22 Thread Thomas Zehetbauer
Hi,

I am desperately trying to get surround sound working here. I have
- Creative Labs SB Live! 5.1 (emu10k1) card
- digital/SPDIF/coaxial connection
- Cambridge SoundWorks DTT2500
- linux-2.6.12.5
- alsa-lib-1.0.9rf-2

Digital and analog sound basically works. I can play music on the front
speakers or headphone and I can even play DVDs in DolbyDigital 5.1 with
ac3 passthrough.

Unfortunately I could not even get the rear/center/LFE connectors of my
card to work until I discovered the following page:
http://alsa.opensrc.org/index.php?page=emu10k1

Now I can either enable the 'SB Live Analog/Digital Output Jack' switch
and use the SPDIF connector to my DD5.1 surround system OR mute this
control and access/unmute the rear/center/LFE channels. Using analog
cabling is not an option as the DTT2500 has no connector for the
center/LFE channels.

Tom

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Surround via SPDIF with ALSA/emu10k1?

2005-08-22 Thread Thomas Zehetbauer
Hi,

I am desperately trying to get surround sound working here. I have
- Creative Labs SB Live! 5.1 (emu10k1) card
- digital/SPDIF/coaxial connection
- Cambridge SoundWorks DTT2500
- linux-2.6.12.5
- alsa-lib-1.0.9rf-2

Digital and analog sound basically works. I can play music on the front
speakers or headphone and I can even play DVDs in DolbyDigital 5.1 with
ac3 passthrough.

Unfortunately I could not even get the rear/center/LFE connectors of my
card to work until I discovered the following page:
http://alsa.opensrc.org/index.php?page=emu10k1

Now I can either enable the 'SB Live Analog/Digital Output Jack' switch
and use the SPDIF connector to my DD5.1 surround system OR mute this
control and access/unmute the rear/center/LFE channels. Using analog
cabling is not an option as the DTT2500 has no connector for the
center/LFE channels.

Tom

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Re: 2.6.12: no sound on SPDIF with emu10k1

2005-07-28 Thread Thomas Zehetbauer
On Thu, 2005-07-28 at 03:13 -0700, Avuton Olrich wrote:
> After upgrading to 1.0.9, I thought my emu10k1 board was broken until
> I toggled 'IEC958 Optical Raw' to Off.

Many thanks, that did the trick! I have now tried to only load the
emu10k1 driver modules and found that 2.6.12's ALSA is VERY different
from all previous versions in that it does not mute all channels by
default any more.

Tom

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Re: 2.6.12: no sound on SPDIF with emu10k1

2005-07-28 Thread Thomas Zehetbauer
On Thu, 2005-07-28 at 03:13 -0700, Avuton Olrich wrote:
 After upgrading to 1.0.9, I thought my emu10k1 board was broken until
 I toggled 'IEC958 Optical Raw' to Off.

Many thanks, that did the trick! I have now tried to only load the
emu10k1 driver modules and found that 2.6.12's ALSA is VERY different
from all previous versions in that it does not mute all channels by
default any more.

Tom

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Re: 2.6.12: no sound on SPDIF with emu10k1

2005-07-27 Thread Thomas Zehetbauer
On Wed, 2005-07-27 at 16:44 -0400, Lee Revell wrote:
> On Wed, 2005-07-27 at 21:46 +0200, Thomas Zehetbauer wrote:
> > I cannot get my SB Live! 5.1's SPDIF (digital) output to work with
> > kernel > 2.6.12. I have not changed my mixer configuration and it is
> > still working when I boot 2.6.11.12 or earlier. I am using FC4 with
> > alsa-lib-1.0.9rf-2.FC4 installed.
> 
> FC4 shipped a buggy ALSA version, I can't believe there are no updated
> RPMs yet.
> 
> You need a newer ALSA.

alsa-lib-1.0.9rf-2 is the latest update available:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/4/x86_64/alsa-lib-1.0.9rf-2.FC4.x86_64.rpm

If FC4's ALSA was really broken, I wonder why it is working fine with
kernel 2.6.11.12 and earlier?

Tom

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2.6.12: no sound on SPDIF with emu10k1

2005-07-27 Thread Thomas Zehetbauer
Hi!

I cannot get my SB Live! 5.1's SPDIF (digital) output to work with
kernel > 2.6.12. I have not changed my mixer configuration and it is
still working when I boot 2.6.11.12 or earlier. I am using FC4 with
alsa-lib-1.0.9rf-2.FC4 installed.

Tom

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2.6.12: no sound on SPDIF with emu10k1

2005-07-27 Thread Thomas Zehetbauer
Hi!

I cannot get my SB Live! 5.1's SPDIF (digital) output to work with
kernel  2.6.12. I have not changed my mixer configuration and it is
still working when I boot 2.6.11.12 or earlier. I am using FC4 with
alsa-lib-1.0.9rf-2.FC4 installed.

Tom

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Re: 2.6.12: no sound on SPDIF with emu10k1

2005-07-27 Thread Thomas Zehetbauer
On Wed, 2005-07-27 at 16:44 -0400, Lee Revell wrote:
 On Wed, 2005-07-27 at 21:46 +0200, Thomas Zehetbauer wrote:
  I cannot get my SB Live! 5.1's SPDIF (digital) output to work with
  kernel  2.6.12. I have not changed my mixer configuration and it is
  still working when I boot 2.6.11.12 or earlier. I am using FC4 with
  alsa-lib-1.0.9rf-2.FC4 installed.
 
 FC4 shipped a buggy ALSA version, I can't believe there are no updated
 RPMs yet.
 
 You need a newer ALSA.

alsa-lib-1.0.9rf-2 is the latest update available:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/4/x86_64/alsa-lib-1.0.9rf-2.FC4.x86_64.rpm

If FC4's ALSA was really broken, I wonder why it is working fine with
kernel 2.6.11.12 and earlier?

Tom

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Re: usb-storage on SMP?

2005-02-25 Thread Thomas Zehetbauer
It seems now that the problem was caused by my 6in1 Card Reader that
identifies itself as "ID 0dda:0001 Integrated Circuit Solution, Inc.".

Strange thing is that the problem went away with maxcpus=1 for my 256MB
SD-Cards but not with my new 1GB SD-Card now.

Tom

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Re: usb-storage on SMP?

2005-02-25 Thread Thomas Zehetbauer
It seems now that the problem was caused by my 6in1 Card Reader that
identifies itself as ID 0dda:0001 Integrated Circuit Solution, Inc..

Strange thing is that the problem went away with maxcpus=1 for my 256MB
SD-Cards but not with my new 1GB SD-Card now.

Tom

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tun/tap(bochs) on AMD64

2005-02-23 Thread Thomas Zehetbauer
Hi,

I am trying to get bochs to use tun/tap on x86_64, strace reveals the
following problem:

open("/dev/net/tun", O_RDWR)= 7
ioctl(7, TUNSETIFF, 0x7fffe6c0) = -1 EINVAL (Invalid argument)

I wonder if this a tun/tap or a bochs problem. Any clues?

Tom

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tun/tap(bochs) on AMD64

2005-02-23 Thread Thomas Zehetbauer
Hi,

I am trying to get bochs to use tun/tap on x86_64, strace reveals the
following problem:

open(/dev/net/tun, O_RDWR)= 7
ioctl(7, TUNSETIFF, 0x7fffe6c0) = -1 EINVAL (Invalid argument)

I wonder if this a tun/tap or a bochs problem. Any clues?

Tom

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Re: 2.6.11-rc3 x86-64 compile err on suse 9.1

2005-02-04 Thread Thomas Zehetbauer
Same problem here on Fedora Core 3, I have put my .config and make
output at http://www.hostmaster.org/~thomasz/linux-2.6.11-rc3/

Tom

PS: Tyan Thunder K8W - works great!
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Re: 2.6.11-rc3 x86-64 compile err on suse 9.1

2005-02-04 Thread Thomas Zehetbauer
Same problem here on Fedora Core 3, I have put my .config and make
output at http://www.hostmaster.org/~thomasz/linux-2.6.11-rc3/

Tom

PS: Tyan Thunder K8W - works great!
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Re: usb-storage on SMP?

2005-01-17 Thread Thomas Zehetbauer
I forgot to mention that I am using a 2.6.10 kernel but will try
2.6.11rc1 soon. Are you using a SMP system? I assume the cabling, card
reader and SD card are OK because the problem went away with maxcpus=1,
the problem must be in the USB ehci/ohci/storage drivers. Do you know if
there is any difference between addressing external hard disks and SD
cards?

Tom

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usb-storage on SMP?

2005-01-17 Thread Thomas Zehetbauer
Hi,

can anyone confirm that writing to usb-storage devices is working on SMP
systems? Especially to a SD Card in an USB 1.1 card reader attached to a
64-bit Dual Opteron with NUMA enabled?

I have a noname USB 1.1 card reader that identifies itself as 0dda:0001
'Integrated Circuit Solution, Inc.' attached to a Tyan Thunder K8W
(S2885) dual Opteron NUMA system. After copying data to the disk, the
activity light flashes for some time and the following messages appear
in syslog:

2005-01-15 13:41:39 +0100 kernel: ohci_hcd :03:00.1: urb 010068400d40 
path 1 ep2out 6fce cc 6 --> status -71
2005-01-15 13:42:59 +0100 kernel: ohci_hcd :03:00.1: GetStatus 
roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
2005-01-15 13:42:59 +0100 kernel: usb 2-1: reset full speed USB device using 
ohci_hcd and address 10
2005-01-15 13:42:59 +0100 kernel: ohci_hcd :03:00.1: GetStatus 
roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
2005-01-15 13:42:59 +0100 kernel: usb 2-1: ep0 maxpacket = 8
2005-01-15 13:42:59 +0100 kernel: usb 2-1: manual set_interface for iface 0, 
alt 0
2005-01-15 13:43:15 +0100 kernel: scsi: Device offlined - not ready after error 
recovery: host 7 channel 0 id 0 lun 2
2005-01-15 13:43:15 +0100 kernel: SCSI error : <7 0 0 2> return code = 0x5
2005-01-15 13:43:15 +0100 kernel: end_request: I/O error, dev sdc, sector 147093
2005-01-15 13:43:15 +0100 kernel: printk: 310019 messages suppressed.
2005-01-15 13:43:15 +0100 kernel: Buffer I/O error on device sdc, logical block 
147093

The system behaves as expected if I boot the kernel with 'maxcpus=1'.

Tom

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usb-storage on SMP?

2005-01-17 Thread Thomas Zehetbauer
Hi,

can anyone confirm that writing to usb-storage devices is working on SMP
systems? Especially to a SD Card in an USB 1.1 card reader attached to a
64-bit Dual Opteron with NUMA enabled?

I have a noname USB 1.1 card reader that identifies itself as 0dda:0001
'Integrated Circuit Solution, Inc.' attached to a Tyan Thunder K8W
(S2885) dual Opteron NUMA system. After copying data to the disk, the
activity light flashes for some time and the following messages appear
in syslog:

2005-01-15 13:41:39 +0100 kernel: ohci_hcd :03:00.1: urb 010068400d40 
path 1 ep2out 6fce cc 6 -- status -71
2005-01-15 13:42:59 +0100 kernel: ohci_hcd :03:00.1: GetStatus 
roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
2005-01-15 13:42:59 +0100 kernel: usb 2-1: reset full speed USB device using 
ohci_hcd and address 10
2005-01-15 13:42:59 +0100 kernel: ohci_hcd :03:00.1: GetStatus 
roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
2005-01-15 13:42:59 +0100 kernel: usb 2-1: ep0 maxpacket = 8
2005-01-15 13:42:59 +0100 kernel: usb 2-1: manual set_interface for iface 0, 
alt 0
2005-01-15 13:43:15 +0100 kernel: scsi: Device offlined - not ready after error 
recovery: host 7 channel 0 id 0 lun 2
2005-01-15 13:43:15 +0100 kernel: SCSI error : 7 0 0 2 return code = 0x5
2005-01-15 13:43:15 +0100 kernel: end_request: I/O error, dev sdc, sector 147093
2005-01-15 13:43:15 +0100 kernel: printk: 310019 messages suppressed.
2005-01-15 13:43:15 +0100 kernel: Buffer I/O error on device sdc, logical block 
147093

The system behaves as expected if I boot the kernel with 'maxcpus=1'.

Tom

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Re: usb-storage on SMP?

2005-01-17 Thread Thomas Zehetbauer
I forgot to mention that I am using a 2.6.10 kernel but will try
2.6.11rc1 soon. Are you using a SMP system? I assume the cabling, card
reader and SD card are OK because the problem went away with maxcpus=1,
the problem must be in the USB ehci/ohci/storage drivers. Do you know if
there is any difference between addressing external hard disks and SD
cards?

Tom

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Re: [reiserfs-list] Re: ReiserFS Oops (2.4.1, deterministic, symlink

2001-02-09 Thread Thomas Zehetbauer

> Since egcs-1.1.2 and gcc 2.95 miscompile the kernel strstr code dont forget
> to stop those being used as well. Oh look you'll need CVS gcc to build the
> kernel... ah but wait that misbuilds DAC960.c...
How did you come to the conclusion that egcs-1.1.2 miscompiles the kernel?
I am using gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) for a
while now and did not notice anything weird.

Tom

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Re: [reiserfs-list] Re: ReiserFS Oops (2.4.1, deterministic, symlink

2001-02-09 Thread Thomas Zehetbauer

 Since egcs-1.1.2 and gcc 2.95 miscompile the kernel strstr code dont forget
 to stop those being used as well. Oh look you'll need CVS gcc to build the
 kernel... ah but wait that misbuilds DAC960.c...
How did you come to the conclusion that egcs-1.1.2 miscompiles the kernel?
I am using gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release) for a
while now and did not notice anything weird.

Tom

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Re: SCO: "thread creation is about a thousand times faster than on native Linux"

2000-09-26 Thread Thomas Zehetbauer

> But if you can get rid of the stacks, and you _can_ get rid of the
> stacks sometimes, then why not have one thread per widget in a GUI?  Or
> one thread per animated objected on a web page?  Some notions of
For this to work without opening up a security hole we must be able to
distribute the processor timeslice for a process among all of it's threads.
Please correct me if I am wrong but AFAIK this is impossible with the current
scheduler logic.

Tom

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Masquerading/TCP/Keepalive

2000-09-11 Thread Thomas Zehetbauer

My company has recently saved the money for buying another block of IP
addresses by switching to a private 10.x.x.x network and uses a linux machine
for masquerading.

We have had this setup in test operation for some time and I have been able
to prevent TCP connections (SSH) from beeing dropped by setting a very low
(120s) keepalive time on the remote machine.

Now that we have completed the migration this does no longer work.
According to our system administrator the only change was that he added an
additional NIC to support masquerading operation.

Any ideas?
Tom

PS: I would also be thankful if someone could tell me how to increase the
TCP timeout on the masquerading gateway.

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Masquerading/TCP/Keepalive

2000-09-11 Thread Thomas Zehetbauer

My company has recently saved the money for buying another block of IP
addresses by switching to a private 10.x.x.x network and uses a linux machine
for masquerading.

We have had this setup in test operation for some time and I have been able
to prevent TCP connections (SSH) from beeing dropped by setting a very low
(120s) keepalive time on the remote machine.

Now that we have completed the migration this does no longer work.
According to our system administrator the only change was that he added an
additional NIC to support masquerading operation.

Any ideas?
Tom

PS: I would also be thankful if someone could tell me how to increase the
TCP timeout on the masquerading gateway.

Microsoft Windows(tm). A thirty-two bit extension and graphical shell
to a sixteen bit patch to an eight bit operating system originally
coded for a four bit microprocessor which was written by a two-bit
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Re: SCO: "thread creation is about a thousand times faster than on native Linux"

2000-09-10 Thread Thomas Zehetbauer

> quote> SCO's Juergen Kienhoefer tells us that by mapping clone processes
> quote> directly onto UnixWare's native threads, huge performance gains
> quote> can be realised. "Basically thread creation is about a thousand
> quote> times faster than on native Linux," he said. The performance boost
> quote> could particularly benefit applications such as Domino, according
> quote> to Kienhoefer.
*ROTFL*
As they are referring to Domino as an application that can benefit from faster
thread creation they obviously do not have any clue what performance and
threading is all about.
I would put this in the same folder as the 'Linux is Open Source and hence
cannot be secured' message before - this was /dev/null here.

Tom

Quantum Mechanics is God's version of "Trust me."
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Re: SCO: thread creation is about a thousand times faster than on native Linux

2000-09-10 Thread Thomas Zehetbauer

 quote SCO's Juergen Kienhoefer tells us that by mapping clone processes
 quote directly onto UnixWare's native threads, huge performance gains
 quote can be realised. "Basically thread creation is about a thousand
 quote times faster than on native Linux," he said. The performance boost
 quote could particularly benefit applications such as Domino, according
 quote to Kienhoefer.
*ROTFL*
As they are referring to Domino as an application that can benefit from faster
thread creation they obviously do not have any clue what performance and
threading is all about.
I would put this in the same folder as the 'Linux is Open Source and hence
cannot be secured' message before - this was /dev/null here.

Tom

Quantum Mechanics is God's version of "Trust me."
-- 
  T h o m a s   Z e h e t b a u e r   ( TZ251 )
  PGP encrypted mail preferred - KeyID 96FFCB89
   mail [EMAIL PROTECTED]

 PGP signature