Confirming on Hardy beta; indeed, it's a kernel (actually, forcedeth driver) bug. Forcedeth driver is known to fail for some reason if Message Signalled Interrupts (MSI) are enabled.
lspci -v: 00:11.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a2) Subsystem: ASUSTeK Computer Inc. Unknown device 81fb Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 506 Memory at efffa000 (32-bit, non-prefetchable) [size=4K] I/O ports at ec00 [size=8] Memory at efff9000 (32-bit, non-prefetchable) [size=256] Memory at efff8000 (32-bit, non-prefetchable) [size=16] Capabilities: [44] Power Management version 2 Capabilities: [70] MSI-X: Enable- Mask- TabSize=8 Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/3 Enable+ Capabilities: [6c] HyperTransport: MSI Mapping 00:12.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a2) Subsystem: ASUSTeK Computer Inc. Unknown device 81fb Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 507 Memory at efff7000 (32-bit, non-prefetchable) [size=4K] I/O ports at eb00 [size=8] Memory at efff6000 (32-bit, non-prefetchable) [size=256] Memory at efff5000 (32-bit, non-prefetchable) [size=16] Capabilities: [44] Power Management version 2 Capabilities: [70] MSI-X: Enable- Mask- TabSize=8 Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/3 Enable+ Capabilities: [6c] HyperTransport: MSI Mapping Asus P5NT WS motherboard. -- Ethernet (nVidia MCP55) not working [ gutsy, hardy] https://bugs.launchpad.net/bugs/136836 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs