[Bug 530263] [NEW] sis190 (sis191), amd64: Ethernet Rx frames > 1510 bytes (ip mtu > 1496 bytes) isn't accepted.

[Mam(O)n]

Public bug reported:

During the attemptions to ping or other actions, which mean the adoption
of the package with the MTU size of interface (1500), the frame isn't
accepted and there is an increasing of value error and frame by one in
ifconfig output. By practical consideration was cleared up, that 4 last
bytes aren't able to get throught, as the maximum size of delivered ip
package can't be more than 1496 bytes (from 1500 supposed to be), and
accordingly to it, the size of the ethernet frame can't be more than
1510 (from 1514 supposed to be) bytes.The tests of this hardware in the
alternative operating system (windows 7) have shown us the positive
result and pointed on the correct work of hardware and the communication
medium.

System: Ubuntu Karmic 9.10 amd64
Core(kernel): 2.6.31-20-generic
Hardware: Laptop Asus F5SL
Network Adapter: Silicon Integrated Systems [SiS] 191 Gigabit Ethernet Adapter (rev 02):

00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] 191 Gigabit Ethernet Adapter (rev 02)
 Subsystem: ASUSTeK Computer Inc. Device 1815
 Flags: bus master, medium devsel, latency 0, IRQ 19
 Memory at fddfcc00 (32-bit, non-prefetchable) [size=128]
 I/O ports at cc00 [size=128]
 Capabilities: <access denied>
 Kernel driver in use: sis190
 Kernel modules: sis190

ps. On 32-bit kernel everything works fine.
pps. May be related: http://bugzilla.kernel.org/show_bug.cgi?id=11509

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 1496 error ethernet frame mtu rx sis191 sis910

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sis190 (sis191), amd64: Ethernet Rx frames > 1510 bytes (ip mtu > 1496 bytes) isn't accepted.
https://bugs.launchpad.net/bugs/530263
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