[Bluez-users] alsa module rebuild

[Bluez-users] alsa module rebuild

[walt shekrota]

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Hi,
 
 On one of my systems I'm having difficulty jumping to the 2.6.20 kernel from 18.
 The kernel builds fine but my headset fails to work. I noted the alsa snd-bt-sco module is not rebuilt.
 Does anyone remember exactly what process it is that builds this component? The btsco code was separate I know..... I am using 0.5 there. 
 snd-bt-sco is in the kernel? If so what question in menuconfig toggles it's creation? In 2.6.18 it was added to the extra directory in /lib/modules/kernelversion for me but in my 2.6.20 build there is no such module.
 
 Thanks for any help.
 -Walt
 
       
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Re: [Bluez-users] alsa module rebuild

[Brad Midgley]

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cd btsco/kernel; sudo make clean default install

On 6/3/07, walt shekrota <penguinacity@yahoo.com> wrote:
>
> Hi,
>
> On one of my systems I'm having difficulty jumping to the 2.6.20 kernel
> from 18.
> The kernel builds fine but my headset fails to work. I noted the alsa
> snd-bt-sco module is not rebuilt.
> Does anyone remember exactly what process it is that builds this
> component? The btsco code was separate I know..... I am using 0.5 there.
> snd-bt-sco is in the kernel? If so what question in menuconfig toggles
> it's creation? In 2.6.18 it was added to the extra directory in
> /lib/modules/kernelversion for me but in my 2.6.20 build there is no such
> module.
>
> Thanks for any help.
> -Walt
>
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Re: [Bluez-users] alsa module rebuild

[walt shekrota]

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Ahhhh I knew a step was missing but couldn't see it in any infos.
 Now it has load problems :(
 warning on make
 
     INSTALL /home/wshek/btsco-0.5/kernel/snd-bt-sco.ko
     DEPMOD  2.6.20-gentoo-r7
     WARNING: /lib/modules/2.6.20-gentoo-r7/extra/snd-bt-sco.ko needs unknown symbol try_to_freeze
 
 probably a kernel dependency I have not enabled? Something new?
 ====
 appears to be show stopper on load
 modprobe snd-bt-sco
 
 : from dmesg tail after trying to load module
 Bluetooth: SCO (Voice Link) ver 0.5
 Bluetooth: SCO socket layer initialized
 snd_bt_sco: Unknown symbol try_to_freeze

 ===
 
 and lsmod does not show module loaded
 Thanks.
 -Walt
 
Brad Midgley <bmidgley@gmail.com> wrote: cd btsco/kernel; sudo make clean default install

On 6/3/07, walt shekrota <penguinacity@yahoo.com> wrote: Hi,
 
 On one of my systems I'm having difficulty jumping to the 2.6.20 kernel from 18. 
 The kernel builds fine but my headset fails to work. I noted the alsa snd-bt-sco module is not rebuilt.
 Does anyone remember exactly what process it is that builds this component? The btsco code was separate I know..... I am using  0.5 there. 
 snd-bt-sco is in the kernel? If so what question in menuconfig toggles it's creation? In 2.6.18 it was added to the extra directory in /lib/modules/kernelversion for me but in my 2.6.20 build there is no such module. 
 
 Thanks for any help.
 -Walt
         

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Re: [Bluez-users] alsa module rebuild

[Brad Midgley]

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Walt

try_to_freeze seems to do something real if config_pm is defined and
otherwise it is a trivial function. either way it should be there, at least
in 2.6.17 in sched.h.

things may have changed more recently.

Brad

On 6/3/07, walt shekrota <penguinacity@yahoo.com> wrote:
>
> Ahhhh I knew a step was missing but couldn't see it in any infos.
> Now it has load problems :(
> warning on make
>
>     INSTALL /home/wshek/btsco-0.5/kernel/snd-bt-sco.ko
>     DEPMOD  2.6.20-gentoo-r7
>     WARNING: /lib/modules/2.6.20-gentoo-r7/extra/snd-bt-sco.ko needs
> unknown symbol try_to_freeze
>
> probably a kernel dependency I have not enabled? Something new?

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Re: [Bluez-users] alsa module rebuild

[walt shekrota]

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yes this is in all the kernels under include/linux/freezer.h.
 I don't see an include for it in the bt code.
 Without digging into it deeper I can't explain the 3 different behaviors...
 
 2.6.18 compiles fine
 2.6.20 warning (apparently deadly)
 2.6.21 where I am not gets pages of errors. My post of these held for admin approval due to length.
 
 Is it me or does the code not scale to later kernels?
 I'm lost.
 Thanks.
 -Walt

Brad Midgley <bmidgley@gmail.com> wrote: Walt

try_to_freeze seems to do something real if config_pm is defined and otherwise it is a trivial function. either way it should be there, at least in 2.6.17 in sched.h.

things may have changed more recently. 

Brad

 

       
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Re: [Bluez-users] alsa module rebuild

[Brad Midgley]

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there is no "stable branch" of the kernel in the same way we had before. the
module api changes enough from release to release to make it painful to
maintain a module outside the kernel. (and don't ask... it will never be
merged upstream because it doesn't belong in the kernel)

On 6/3/07, walt shekrota <penguinacity@yahoo.com> wrote:
>
> yes this is in all the kernels under include/linux/freezer.h.
> I don't see an include for it in the bt code.
> Without digging into it deeper I can't explain the 3 different
> behaviors...
>
> 2.6.18 compiles fine
> 2.6.20 warning (apparently deadly)
> 2.6.21 where I am not gets pages of errors. My post of these held for
> admin approval due to length.
>
> Is it me or does the code not scale to later kernels?
> I'm lost.
> Thanks.
> -Walt
>
> *Brad Midgley <bmidgley@gmail.com>* wrote:
>
> Walt
>
> try_to_freeze seems to do something real if config_pm is defined and
> otherwise it is a trivial function. either way it should be there, at least
> in 2.6.17 in sched.h.
>
> things may have changed more recently.
>
> Brad
>
>
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Re: [Bluez-users] alsa module rebuild

[walt shekrota]

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I hope that you are not upset that was not my intention. I am just trying to understand clearly what is possible.
 Does this mean I should not have migrated from 2.6.18 if I still wanted to use bluez? 
 Can anyone confirm they use later?
 Thanks for helping.
 -Walt
 My wording is because I was not convinced I had not done something wrong. :)
 

Brad Midgley <bmidgley@gmail.com> wrote:there is no "stable branch" of the kernel in the same way we had before. the module api changes enough from release to release to make it painful to maintain a module outside the kernel. (and don't ask... it will never be merged upstream because it doesn't belong in the kernel) 

 

 
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Re: [Bluez-users] alsa module rebuild

[walt shekrota]

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Ok due to the fact alsa can be configured in or out of the kernel I would assume that the piece of bt that interfaces to it should eventually be in the kernel?
 Or is the advisement that if you use bt you should seriously consider configuring your alsa modular as opposed to kernel?
 
 Will that work better for most people?
 
 Thanks.
 -Walt

Brad Midgley <bmidgley@gmail.com> wrote:there is no "stable branch" of the kernel in the same way we had before. the module api changes enough from release to release to make it painful to maintain a module outside the kernel. (and don't ask... it will never be merged upstream because it doesn't belong in the kernel) 

 

 
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Re: [Bluez-users] alsa module rebuild

[Brad Midgley]

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Walt

bt headset audio on linux has evolved over time

bluetooth-alsa's btsco uses a kernel module for the audio interface which is
a poor choice
bluetooth-alsa's plugz does the audio handling in userspace where it belongs
but lost some functionality
bluez will have an audio system that handles audio in userspace but gains a
lot more flexibility than btsco ever had

Brad

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Re: [Bluez-users] alsa module rebuild

[walt shekrota]

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Hi Brad,
 
 Forgive me for seeming dense. So instead of btsco I should look for this alsa plugz?
 I take it I can find this up on sourceforge?
 
 Or is this a work in progress?
 
 Thanks for any info.
 -Walt

Brad Midgley <bmidgley@gmail.com> wrote: Walt

bt headset audio on linux has evolved over time

bluetooth-alsa's btsco uses a kernel module for the audio interface which is a poor choice
bluetooth-alsa's plugz does the audio handling in userspace where it belongs but lost some functionality 
bluez will have an audio system that handles audio in userspace but gains a lot more flexibility than btsco ever had

Brad

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