Akemi Yagi wrote:
On Wed, Jul 21, 2010 at 3:20 PM, Rob Kampen <rkampen@xxxxxxxxxxxxxxxxx> wrote:
Rob Kampen wrote:
I have started to setup an rpmbuild environment but need to read some more
instructions, as when I followed the wiki I got different results - not sure
if this is due to using the centosplus SRPM, as that is what all my
workstations use, or due to my error in following instructions.
When I tried the make oldconfig after copying the config file as indicated I
ended up having to respond to lots of option questions that I have no idea
about, thus I'm likely to select an option that causes problems.
I thought make oldconfig was a process to dump out the current config
settings so they could be used as a template for the new
build......confused.
Because you are starting with a centosplus kernel and cplus kernels
are already customized, you do not have to go through the
customization part of the wiki instruction. In your case, all you
have to do it to remove one patch.
I see the patch to be removed is this one:
Patch24883: linux-2.6-sound-alsa-hda-driver-update-for-rhel5-5.patch
Therefore, look for the line:
%patch24883 -p1
and delete it (it is line 9753 in the current kernel). If you had
already modified the .spec file, I suggest you start fresh. The only
other change you would want to make is "buildid" to provide a unique
name for your new kernel.
Good luck!
Well firstly let me thank all those who have done such an excellent job
with Centos, and the wiki.
I have managed to rpmbuild my first ever kernel minus the patch - and it
installed and booted just fine.
A real tribute to all the centos team and particularly those that have
taken the time to document the howto pages.
Unfortunately that particular patch is not the issue - sound still
didn't work.
So I went back and looked at dmesg and found that snd-usb-audio is
loading first and as modprobe.conf had no specific instructions about
this device driver it installed it as card 0 - thus when it subsequently
tried to load snd-hda-intel as card 0 it failed.
My initial fix was to edit modprobe.conf and make the snd-hda-intel as
card 1.
Reboot and now the card shows up okay and sound worked.
Using the System > Administration > Soundcard Detection configurator
showed both devices as it did for the 164 and earlier kernels.
The settings tab allows one to change the order of devices. Looking at
the modprobe.conf produced by this procedure yielded the following :-
<snip>
options snd cards_limit=8
alias snd-card-0 snd-hda-intel
options snd-hda-intel index=0
alias snd-card-1 snd-usb-audio
options snd-usb-audio index=1
thus now I have specific instruction to load the snd-usb-audio as device
1 and thus snd-hda-intel can load as device 0.
why this worked okay without the two lines for snd-usb-audio on 164
(5.4) kernels is a mystery to me.
I hope this may be of help to others that suddenly find sound devices
failing to perform as expected.
All in all a learning experience.
Thanks to Ned and Akemi for getting me headed in the right direction.
Akemi
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