6 Jan
2004
6 Jan
'04
9:47 a.m.
I was wondering if anyone has patched the kernel with the rtc patch for
alsa in 2.4.23? I have patched it on 2.4.20 but was wanting to upgrade
the kernel and 2.6.0 seems a little unsupported audio-wise at the
moment.
Any success stories and howtos would be appreciated.
James
6 Jan
6 Jan
11:41 p.m.
On Tue, 2004-01-06 at 13:46, James Stone wrote:
2.6.0 seems a little unsupported audio-wise
really ? why ?
alsa is now shipped within the kernel source (which still let you use
the last alsa version if you need it).
preemptible patch is included too.
the only patch i need to run as a user jack is the one mentioned here:
http://jackit.sourceforge.net/docs/faq.php#a5
(and iiuc it is likely to disappear some day ...)
greetings, piem
7 Jan
7 Jan
9:10 a.m.
On Wed, Jan 07, 2004 at 03:37:24AM +0000, Paul Brossier wrote:
On Tue, 2004-01-06 at 13:46, James Stone wrote:
Yep.. got 2.6.0 working now. It does seem to be pretty good! I am
getting a non-audio related kernel panic on shutdown but apart from that
it is very nice. I was under the impression the RTC timing was not as
good as the patched 2.4 kernel but it sounds pretty close to me.
James
2.6.0 seems a little unsupported audio-wise
really ? why ?
alsa is now shipped within the kernel source (which still let you use
the last alsa version if you need it).
preemptible patch is included too.
the only patch i need to run as a user jack is the one mentioned here:
http://jackit.sourceforge.net/docs/faq.php#a5
(and iiuc it is likely to disappear some day ...)
greetings, piem 
8:58 p.m.
Once upon a Wed, Jan 07 2004, James Stone hit keys in the following order:
Yep.. got 2.6.0 working now. It does seem to be pretty good! I am
getting a non-audio related kernel panic on shutdown but apart from that
it is very nice. I was under the impression the RTC timing was not as
good as the patched 2.4 kernel but it sounds pretty close to me.
did you do a 'sysctl dev.rtc.max-user-freq=1024' ? I'm pretty happy with
2.6.0-mm2 right now, which seems to give me better performance then 2.4.22 with
all the patches in place. i chose to run the mm patch because i had trouble
with my disk performance and Andrew included a ext3-latency-fix.patch ... in
the end it appeared that my trouble were because i accedently included my
chipset support only as a module which was never loaded, so the disk wasn't in
udma mode.
after that i've never had as little xruns at 64 frames per period, 2 periods
per buffer as ever before! only about 2 an hour and that's when i'm doing my
non audio stuff, being rough with memory, rough with the amount of programs
opened at the same time and rough with switching between them.
imho 2.6.0 is a great step forwards, and i only hope that networking wouldn't
always get more priority then audio, although must say that i only notice this
to be a problem when i provide offline backup storage for weird people who are
so desperate for backups that they use newsgroups for their movie collection ;)
martijn.
8 Jan
8 Jan
11:45 a.m.
On Thu, Jan 08, 2004 at 01:54:41AM +0100, martijn wrote:
Once upon a Wed, Jan 07 2004, James Stone hit keys in
the following order:
No I hadn't. That is very useful though I needed to do
sysctl -w dev.rtc.max-user-freq=1024
(i.e. with the -w switch)
I still had a problem when I tried to enable capabilities with the
patch for jack. When I ran jack with startjack as a normal user, it ran
for a short while then stopped (can't remember the error message now.. I
changed back to the unpatched kernel and now start jack as root). Any
hints on how to get this working would be appreciated.
But overall, I agree, 2.6 is a great step forward.
James
Yep.. got 2.6.0 working now. It does seem to be pretty good! I am
getting a non-audio related kernel panic on shutdown but apart from that
it is very nice. I was under the impression the RTC timing was not as
good as the patched 2.4 kernel but it sounds pretty close to me.
did you do a 'sysctl dev.rtc.max-user-freq=1024' ? I'm pretty happy with
2.6.0-mm2 right now, which seems to give me better performance then 2.4.22 with
all the patches in place. i chose to run the mm patch because i had trouble
with my disk performance and Andrew included a ext3-latency-fix.patch ... in
the end it appeared that my trouble were because i accedently included my
chipset support only as a module which was never loaded, so the disk wasn't in
udma mode.
12:23 p.m.
On Thu, Jan 08, 2004 at 03:45:22PM +0000, James Stone wrote:
On Thu, Jan 08, 2004 at 01:54:41AM +0100, martijn
wrote:
Just tried it again and it works fine.. don't know what the problem
was.. think it may have been a similar chipset problem to the one you
had!
James
Once upon a Wed, Jan 07 2004, James Stone hit
keys in the following order:
No I hadn't. That is very useful though I needed to do
sysctl -w dev.rtc.max-user-freq=1024
(i.e. with the -w switch)
I still had a problem when I tried to enable capabilities with the
patch for jack. When I ran jack with startjack as a normal user, it ran
for a short while then stopped (can't remember the error message now.. I
changed back to the unpatched kernel and now start jack as root). Any
hints on how to get this working would be appreciated.
Yep.. got 2.6.0 working now. It does seem to be pretty good! I am
getting a non-audio related kernel panic on shutdown but apart from that
it is very nice. I was under the impression the RTC timing was not as
good as the patched 2.4 kernel but it sounds pretty close to me.
did you do a 'sysctl dev.rtc.max-user-freq=1024' ? I'm pretty happy with
2.6.0-mm2 right now, which seems to give me better performance then 2.4.22 with
all the patches in place. i chose to run the mm patch because i had trouble
with my disk performance and Andrew included a ext3-latency-fix.patch ... in
the end it appeared that my trouble were because i accedently included my
chipset support only as a module which was never loaded, so the disk wasn't in
udma mode.
2:41 p.m.
James Stone <stone1(a)btinternet.com> writes:
I still had a problem when I tried to enable
capabilities with the
patch for jack. When I ran jack with startjack as a normal user, it ran
for a short while then stopped (can't remember the error message now.. I
changed back to the unpatched kernel and now start jack as root). Any
hints on how to get this working would be appreciated.
The messages would be helpful. You did this by applying the normal
capabilities patch[1] by hand? I haven't tried that yet, because I've
been experimenting with Linux Security Modules.
If you like to live dangerously, here's[2] a preliminary realtime LSM
for 2.6 you can try. It works with an unpatched kernel, but you need
kernel sources to build it and install it.
[1] http://jackit.sourceforge.net/docs/faq.php#a5
[2] http://www.joq.us/realtime
But overall, I agree, 2.6 is a great step forward.
Agreed. I just built a vanilla 2.6.0 last night. To my surprise, its
realtime performance seems much better than 2.6.0-test11 on my system.
No hard numbers, just a seat of the pants impression, but noticable.
--
joq
9 Jan
9 Jan
5:53 a.m.
On Thu, Jan 08, 2004 at 12:38:51PM -0600, Jack O'Quin wrote:
James Stone <stone1(a)btinternet.com> writes:
Yep thats right.. Don't know what went wrong as it seemed to work when
I tried it the second time. I think I had set RTC as a module in kernel
and not sure if it was loading properly.. Also I had not set my MB
chipset in the kernel so everything was slow, so that could have been
adding latency problems.. anyway, it is working now. I can't get as good
latencies as you but then I am using a SBLive! Seems relatively stable
in full duplex at 2 / 512.
I still had a problem when I tried to enable
capabilities with the
patch for jack. When I ran jack with startjack as a normal user, it ran
for a short while then stopped (can't remember the error message now.. I
changed back to the unpatched kernel and now start jack as root). Any
hints on how to get this working would be appreciated.
The messages would be helpful. You did this by applying the normal
capabilities patch[1] by hand? I haven't tried that yet, because I've
been experimenting with Linux Security Modules.
If you like to live dangerously, here's[2] a preliminary realtime LSM
for 2.6 you can try. It works with an unpatched kernel, but you need
kernel sources to build it and install it.
[1] http://jackit.sourceforge.net/docs/faq.php#a5
[2] http://www.joq.us/realtime
The module looks interesting. I think I will wait til it gets into the
kernel to try it though. (knowing me this will mean I will probably try
it out in the next few days!! ;) )
James
11 Jan
11 Jan
2:39 p.m.
On Thu, 2004-01-08 at 18:38, Jack O'Quin wrote:
Agreed. I just built a vanilla 2.6.0 last night. To
my surprise, its
realtime performance seems much better than 2.6.0-test11 on my system.
No hard numbers, just a seat of the pants impression, but noticable.
I got a strange problem with 2.6.1 :
- i first forgot to apply the capability.h patch before compiling. the
kernel was booting fine, but i could not run jack.
- after recompiling with the patch applied, i get a kernel panic which
looks approximately like this :
[...]
NET: Registeref protocol family 2
IP: routing cache hash table of 4096 buckets, 32Kbytes
Kernel panic: failed to create the TCP control socket
[...]
which comes from /usr/src/linux/net/ipv4/tcp_ipv4.c (line 2645).
Any idea how to avoid this ?
Many thanks,
piem
12 Jan
12 Jan
4:07 p.m.
it works here too, and alsa 1.0.1 !
does not seem less stable, rather more so far :)
thanks, piem
On Sun, Jan 11, 2004 at 09:57:04PM +0100, Florian Schmidt wrote:
On Sun, 11 Jan 2004 18:36:12 +0000
Paul Brossier <piem-lists(a)altern.org> wrote:
Any idea how to avoid this ?
try jack o'quin's realtime module. it worked for me..
--
hrrrm!
7 Jan
7 Jan
9:11 a.m.
On Wed, Jan 07, 2004 at 03:37:24AM +0000, Paul Brossier wrote:
On Tue, 2004-01-06 at 13:46, James Stone wrote:
Yep.. got 2.6.0 working now. It does seem to be pretty good! I am
getting a non-audio related kernel panic on shutdown but apart from that
it is very nice. I was under the impression the RTC timing was not as
good as the patched 2.4 kernel but it sounds pretty close to me.
James
2.6.0 seems a little unsupported audio-wise
really ? why ?
alsa is now shipped within the kernel source (which still let you use
the last alsa version if you need it).
preemptible patch is included too.
the only patch i need to run as a user jack is the one mentioned here:
http://jackit.sourceforge.net/docs/faq.php#a5
(and iiuc it is likely to disappear some day ...)
greetings, piem
7676
days inactive
7682
days old
linux-audio-user@lists.linuxaudio.org
11 comments
5 participants
participants (5)
-
Florian Schmidt -
Jack O'Quin -
James Stone -
martijn -
Paul Brossier