Thanks David. So from the pci info we use the exactly same ehternet chip in the clients. Hardy being the last known good case may have a larger impact on how the hardware is driven. One thing that looked a bit weird but maybe has no implication here is the very low count on timer interrupts (though problems there usually come as: system stops doing anything until I hit a keyboard key). Something that probably has changed a lot since Hardy and which I personally saw causing problems sometimes is the MSI support. If you got time, you could try to boot with "pci=nomsi" on the kernel command line? When that is in effect the interrupt assigned to eth0 should not say MSI anymore. Does this change anything?
Thanks David. So from the pci info we use the exactly same ehternet chip in the clients. Hardy being the last known good case may have a larger impact on how the hardware is driven. One thing that looked a bit weird but maybe has no implication here is the very low count on timer interrupts (though problems there usually come as: system stops doing anything until I hit a keyboard key). Something that probably has changed a lot since Hardy and which I personally saw causing problems sometimes is the MSI support. If you got time, you could try to boot with "pci=nomsi" on the kernel command line? When that is in effect the interrupt assigned to eth0 should not say MSI anymore. Does this change anything?