Testing shows that an MTU equal to, or larger than 1498 bytes causes this issue. Smaller values do not.
Hopefully this will help point someone in the right direction in the driver This is an HP laptop, with the following NIC: 02:0e.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5788 Gigabit Ethernet (rev 03) Subsystem: Hewlett-Packard Company Device 30aa Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16 Memory at e8110000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at <ignored> [disabled] Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data <?> Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+ Queue=0/3 Enable- Kernel driver in use: tg3 Kernel modules: tg3 -- tg3 transmit timeout in Intrepid https://bugs.launchpad.net/bugs/294092 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