BTW, Ralf, it is a good idea to build the 3.6.11-rt25 kernel. It has a lot of bug fixes as I heard from the mailing lists. Also, can you provide us a comparesent on the performance and audio recording on both the 3.5-lowlatency and the 3.6-rt kernel:-P Regards, Howard Chan (smartboyhw) <div class="gmail_quote">On 2012-12-22 下午1:46, "Ralf Mardorf" <<a href="mailto:ralf.mardorf@alice-dsl.net">ralf.mardorf@alice-dsl.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> You can purge a kernel by apt or completely remove it with synaptic, without any risk, that this will break anything of other installed packages. But as Mike already hinted, you always should keep a kernel, that does work and I'll add, you always should keep a backup of your complete install. You also should reconsider if upgrading packages, just for version hunting is useful. Of course, security update are important and sometimes you perhaps want new features, but if you want a stable production environment, you should be aware, that upgrades could make your Linux unstable. If you completely will remove a kernel you can't do it by simply removing the package. Assumed you needed special drivers, they will not be removed, you have to delete them manually. ls /lib/modules will show you, if there are drivers kept for a kernel you removed. On Quantal I've 3.5.0-18-lowlatency and 3.6.5-rt14 installed. Both kernels do work, but I only use the self-build kernel-rt. I keep the lowlatency kernel, just in case I should install something and my self-build kernel should cause issues. -- Ubuntu-Studio-users mailing list <a href="mailto:Ubuntu-Studio-users@lists.ubuntu.com">Ubuntu-Studio-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users</a> </blockquote></div>