[PlanetCCRMA] FC2 "experimental" kernel install dependency error

[Brad Fuller]

Brad Fuller wrote:

> Ok, I got the kernel 2.6.7-1.437.1.11.rhfc2.ccrma loaded. 
> Unfortunately, Xwindows didn't start up. I had to change the 
> nvidia6111 driver to the older one -- and then X started up. Why would 
> this be? I was going to install 6111 again -- the nvidia installer 
> said it was already installed (thought maybe there was some 
> interaction between this kernel and nvidia6111.)
>
> Anyone come across this?
>
> brad
>
I take that back about the kernel. I did load it successfully (at least 
the logs don't say there are problems) but:

# cat /proc/sys/kernel/lowlatency

replies:

cat: /proc/sys/kernel/lowlatency: No such file or directory

so, jackstart doesn't start. of course.

Note that this is NOT from the experimental repos. Perhaps I should try 
these, Fernando?  You did mention below that these have had more 
success. Still...I do wonder why I don't have lowlatency.

Any ideas where to look?

(I do have "kernel.lowlatency=1" in /etc/sysctl.conf)

brad

> Fernando Pablo Lopez-Lezcano wrote:
>
>>On Wed, 2004-11-03 at 22:43, Brad Fuller wrote:
>>  
>>
>>>Tried to install the new FC2 ccrma kernel:
>>>
>>># apt-get install planetccrma-core
>>>
>>>but received a conflict that 
>>>
>>>    
>>>
>>>>file /usr/lib/libasound.so.2.0.0 from install of
>>>>      
>>>>
>>>alsa-lib-1.0.5-1.cvs.rhfc2.ccrma conflicts with file from package
>>>libasound2.1.0.6-16.rhfc2.at
>>>    
>>>
>>
>>That's a conflict caused by unfortunate non-standard naming of the alsa
>>library packages at atrpms. I should (will in the next release) include
>>an "Obsoletes:" clause for them, but the proper fix will be for atrpms
>>to return to the "standard" naming of those packages ("standard" as in
>>"what all others do, including the base redhat/fedora distribution"). 
>>
>>  
>>
>>>A LOT of packages depend on the libasound2.10.06. Any way to get
>>>around this? 
>>>    
>>>
>>
>>You can either install the planetccrma-core critical components one by
>>one, or get rid of the libasound2 packages and replace them by the
>>equivalent alsa-lib packages (BTW, is there an explicit dependency on
>>libasound2?, there should not be one, try "rpm -q --whatrequires
>>libasound2"). 
>>
>>For the first option, do an "apt-get install kernel" and you will see
>>the choices you have. The most conservative one for fc2 will be
>>kernel#2.6.7-1.437.1.ll.rhfc2.ccrma (that is the one "required" by
>>planetccrma-core), there are other more experimental kernels in the
>>"planetedge" repository. Those have better low latency performance but
>>are riskier to run[*]. 
>>
>>I posted this a while ago:
>>  
>>
>>>The best kernels I currently have for 2.6 are in the "experimental"
>>>repository, they have to be installed explicitly (not through a meta
>>>package), and they are only advertised in the mailing list. 
>>>
>>>Check this post for information on current latest bleeding edge
>>>kernel:
>>>http://ccrma-mail.stanford.edu/pipermail/planetccrma/2004-August/005879.html
>>>And follow the link inside for more details...
>>>
>>>Remember that before trying the apt-get install xxx. you have to add
>>>another line to the /etc/apt/sources.list (same as the planetcore
>>>line, but replacing planetcore with planetedge), and do an apt-get
>>>update. 
>>>    
>>>
>>
>>If you install either (edge or conservative), you also have available a
>>newer alsa than the one included in the kernel itself, for that do an:
>>
>>apt-get install kernel-module-alsa
>>
>>and again you will get choices. Explicitly install the one that matches
>>the kernel you just installed. 
>>
>>-- Fernando
>>
>>[*] I was hoping that by now the experimental voluntary-preempt patches
>>for very good low latency performance would have stabilized a lot, but
>>another approach was taken by Ingo Molnar and we now have a very new
>>"realtime-preempt" patch that promises to be even better. Regretfully it
>>is still quite unstable. I'm trying it out regularly and trying to
>>follow its development but I have not posted experimental packages yet
>>(let me know if any on the list needs to be a guinea pig). 
>>
>>
>>_______________________________________________
>>PlanetCCRMA mailing list
>>PlanetCCRMA at ccrma.stanford.edu
>>http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
>>
>>
>>  
>>
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