On Fri, 2010-07-09 at 12:54 +0100, Daniel James wrote: > It's true that Ubuntu Studio is pretty close to our original > design for the 64 Studio distro.
No it isn't. I experienced that non of the kernel-rt from the repository is boot-able. By default they install not a kernel-rt. I couldn't build a kernel-rt that is boot-able. -------- Forwarded Message -------- From: Ralf Mardorf <ralf.mard...@alice-dsl.net> To: Niels Mayer <nielsma...@gmail.com> Cc: Linux Audio Developers <linux-audio-...@lists.linuxaudio.org> Subject: Re: [LAD] PCI MIDI jitter - comparison Ubuntu (bad) and Suse (might be ok) Date: Mon, 12 Jul 2010 02:45:38 +0200 On Sun, 2010-07-11 at 12:02 -0700, Niels Mayer wrote: > It's perfectly fine for the 1712, and the audio sync probably has > nothing to do with midi jitter. Yep, I just wanted to underline that at the moment this are two cards, but one virtual. Unfortunately no kernel-rt is boot-able for my Ubuntu Studio 10.04. If 64 Studio isn't continued, I don't know any good DEB based audio Linux for 64-bit architecture. AV Linux seems to be good, but is released only as i386. Hm, perhaps OT for this list: I wonder if anybody run Ubuntustudio 10.04 with a kernel-rt. Building a kernel failed. And all kernel-rt from the repositories failed. $ cd /usr/src $ sudo synaptic I checked if those packages were installed: bin86 build-essential bzip2 fakeroot gcc kernel-package make libncurses5-dev $ wget ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.33.5.tar.bz2 $ wget http://www.kernel.org/pub/linux/kernel/projects/rt/patch-2.6.33.5-rt23.bz2 $ tar xvjf linux-2.6.33.5.tar.bz2 $ rm linux-2.6.33.5.tar.bz2 $ mv linux-2.6.33.5 linux-2.6.33.5-rt23 $ ln -s linux-2.6.33.5-rt23 linux $ cd linux $ bunzip2 ../patch-2.6.33.5-rt23.bz2 $ patch -p1 < ../patch-2.6.33.5-rt23 $ rm ../patch-2.6.33.5-rt23 $ cp /boot/config-2.6.32-23-preempt .config $ make oldconfig 81 x Enter $ make menuconfig Edited from Generic-x86-64 to Opteron/Athlon64/Hammer/K8 Save an Alternate Configuration File $ make oldconfig Nothing to do $ make-kpkg clean $ export CONCURRENCY_LEVEL=2 This didn't work: $ make-kpkg --rootcmd fakeroot --initrd kernel-image kernel-headers kernel-source 50 minutes later make[5]: *** [drivers/staging/comedi/drivers/quatech_daqp_cs.o] Error 1 make[4]: *** [drivers/staging/comedi/drivers] Error 2 Hence I edited .config: $ cat .config | grep COMEDI CONFIG_COMEDI=m # CONFIG_COMEDI_DEBUG is not set CONFIG_COMEDI_PCI_DRIVERS=m CONFIG_COMEDI_PCMCIA_DRIVERS=m CONFIG_COMEDI_USB_DRIVERS=m $ gedit .config $ cat .config | grep COMEDI # CONFIG_COMEDI is not set # CONFIG_COMEDI_DEBUG is not set # CONFIG_COMEDI_PCI_DRIVERS is not set # CONFIG_COMEDI_PCMCIA_DRIVERS is not set # CONFIG_COMEDI_USB_DRIVERS is not set $ make oldconfig Nothing to do $ make-kpkg clean $ make-kpkg --rootcmd fakeroot --initrd kernel-image kernel-headers kernel-source Another 50 minutes later make[4]: *** [drivers/staging/pohmelfs/inode.o] Error 1 make[3]: *** [drivers/staging/pohmelfs] Error 2 Hence I edited .config: $ cat .config | grep POHMEL CONFIG_POHMELFS=m # CONFIG_POHMELFS_DEBUG is not set CONFIG_POHMELFS_CRYPTO=y $ gedit .config $ cat .config | grep POHMEL # CONFIG_POHMELFS is not set # CONFIG_POHMELFS_DEBUG is not set # CONFIG_POHMELFS_CRYPTO is not set $ make oldconfig Nothing to do $ make-kpkg clean Here it is ok: $ make-kpkg --rootcmd fakeroot --initrd kernel-image kernel-headers kernel-source 80 minutes later $ cd .. $ sudo dpkg -i linux-image-2.6.33.5-rt23_2.6.33.5-rt23-10.00.Custom_amd64.deb :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: When I tried to boot the kernel I got '[ 0.499322] ACPI: Expecting a [Reference] package element, found type 0 [ 0.811991] kernel panic - not syncing: VPS: Unable to mount root fs on unknown-block (0,0)' For the entry in grub.cfg initrd is missing: menuentry 'Ubuntu, with Linux 2.6.33.5-rt23' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod ext2 set root='(hd1,11)' search --no-floppy --fs-uuid --set 54b5bb8c-356a-4268-8592-e76aac7941a8 linux /boot/vmlinuz-2.6.33.5-rt23 root=/dev/sdb11 ro quiet splash } Unfortunately initrd is missing too: $ ls /boot/initrd* /boot/initrd.img-2.6.32-23-preempt $ ls /boot abi-2.6.32-23-preempt grub System.map-2.6.32-23-preempt vmlinuz-2.6.32-23-preempt config-2.6.32-23-preempt initrd.img-2.6.32-23-preempt System.map-2.6.33.5-rt23 vmlinuz-2.6.33.5-rt23 config-2.6.33.5-rt23 memtest86+.bin :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: 'Kernels * Amd64 -generic will be installed if ubuntustudio-audio meta is NOT selected during installation process -preempt kernel will be installed if ubuntustudo-audio meta IS selected during installation process -lowlatency kernel is also available in Abogani's PPA - https://launchpad.net/~abogani/+archive/ppa -realtime kernel will be available in Ubuntu Studio PPA' http://ubuntustudio.org/LucidLynx So I added 'deb http://ppa.launchpad.net/abogani/ppa/ubuntu lucid main' and 'deb-src http://ppa.launchpad.net/abogani/ppa/ubuntu lucid main'. Then I installed the rt kernel from this repository. :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: When I try to boot kernel 2.6.33-23-realtime from the repository I get 'ACPI: Expecting a [Reference] package element, found type 0' too, but no kernel panic, instead it will boot into text mode. Cheers! Ralf _______________________________________________ 64studio-devel mailing list 64studio-devel@lists.64studio.com http://lists.64studio.com/mailman/listinfo/64studio-devel
