Hi Pithball, Thanks for the info. I am using kernel 2.6.17-1.2157_FC5 from fedora's repository. According to http://fedoranews.org/cms/node/1337 that would be not much older than 2006-07-14. The email you referred to was send on June 29th. Could be it's not yet included in my kernel ... ?! Would be so great if a new kernel fixes my sound problem! Thanks, JeeBee. Fedora Update Notification FEDORA-2006-806 2006-07-14 Summary : The Linux kernel (the core of the Linux operating system) Description : The kernel package contains the Linux kernel (vmlinuz), the core of any Linux operating system. The kernel handles the basic functions of the operating system: memory allocation, process allocation, device input and output, etc. --------------------------------------------------------------------- Update Information: Rebase to latest upstream 2.6.17.4 -stable release, which fixes a security issue which could result in local priveledge escalation. More details at: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.4 In addition, an optimisation was performed to use significantly less memory for several heavily used kernel data structures.