[Bug 16890] New: unreliable network connection after upgrade (hoary -> breezy)

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Ubuntu | linux

           Summary: unreliable network connection after upgrade (hoary ->
                    breezy)
           Product: Ubuntu
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: linux
        AssignedTo: ben.collins at ubuntu.com
        ReportedBy: doko at ubuntu.com
         QAContact: kernel-bugs at lists.ubuntu.com


after an hoary->breezy upgrade to 2.6.12-9-686), packages are dropped on a
regular basis, sometimes, the system seems to recover (seeing only about 10-20
ping's fail), but usually, the network doesn't come up automatically. can be
restored by:

# ifdown eth0
Oct  3 11:58:36 localhost dhcpd: receive_packet failed on eth0: Network is down
# ifup eth0
Oct  3 11:58:40 localhost kernel: [4435443.952000] eth0: link up, 100Mbps,
full-duplex, lpa 0xC5E1

It then works again for some minutes. Rebooting to the hoary kernel shows up a
stable system again.

syslog entries, where the recovery succeeds:

Oct  3 11:58:18 localhost kernel: [4435421.834000] NETDEV WATCHDOG: eth2:
transmit timed out
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2: Transmit timeout,
status 01 0000 0000 media 18.
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2: Tx queue start entry 13
 dirty entry 9.
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2:  Tx descriptor 0 is
00002000.
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2:  Tx descriptor 1 is
00002000. (queue head)
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2:  Tx descriptor 2 is
00002000.
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2:  Tx descriptor 3 is
00002000.
Oct  3 11:58:18 localhost kernel: [4435421.834000] eth2: link up, 10Mbps,
half-duplex, lpa 0x0000

Oct  3 11:58:34 localhost kernel: [4435438.472000] NETDEV WATCHDOG: eth0:
transmit timed out
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0: Transmit timeout,
status 01 0000 0000 media 10.
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0: Tx queue start entry
115  dirty entry 111.
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0:  Tx descriptor 0 is
00002000.
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0:  Tx descriptor 1 is
00002000.
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0:  Tx descriptor 2 is
00002000.
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0:  Tx descriptor 3 is
00002000. (queue head)
Oct  3 11:58:34 localhost kernel: [4435438.472000] eth0: link up, 100Mbps,
full-duplex, lpa 0xC5E1

$ cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 9
model name      : VIA Nehemiah
stepping        : 8
cpu MHz         : 534.957
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr cx8 sep mtrr pge cmov pat mmx fxsr sse
rng rng_en ace ace_en
bogomips        : 1057.84

$ lsmod|grep 8139
8139cp                 19744  0
8139too                25504  0
mii                     5696  2 8139cp,8139too

$ lspci|grep 8139
0000:00:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
0000:00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
0000:00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
0000:00:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)

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