I'm experiencing serious problems with the I2O drivers in 2.6.15 and 2.6.16 kernels. I suppose it could be something specific about the binary kernels as supplied by Fedora Core but am suspecting not since underlying I2O drivers changed at the same time.

I submitted a bug report to RedHat's bugzilla: https://bugzilla.redhat.com/bugzilla....cgi?id=190340

Is anyone else seeing the same type of problem? Do you have a workaround or fix?

I have multiple SuperMicro servers with Adaptec RAID cards and many of them use I2O drivers. Any with Fedora Core 4 and kernels 2.6.14-1.1656_FC4smp or older seem fine and are stable. Any with 2.6.15.?? or the latest 2.6.16-1.2096_FC4SMP are extremely unstable. Again though, I'm quoting released "FC" kernels, not the mainstream stock kernel. Nor have I tried building a stock kernel, yet.

Fedora Core 5 uses a 2.6.16 kernel on the install CD and as a result will rarely make it all the way through an install on any of these servers. It appears that if I2O is involved and the kernel version is >2.6.14, watch out...

I added "pci=routeirq" to the kernel boot line on one test box I've been working with and it improved stability it appeared, but not to the point of production-worthiness. Booting non-SMP also seemed to delay the inevitable lockup slightly, but not by much.

Thanks.