well- this is interesting & i'm pretty lost- hoping someone out there can help- here's the story---

my computer is running ubuntu hardy & slackware 12.. my motherboard has a built in lan (Realtek 8201CL PHY) --everything worked great- then one day- internet just stopped. lights flash occasionally on the modem- but no connection (on ubuntu- slackware worked just fine..) after several attempts to get it going again- i grabbed a network card that was from a previous computer (a 'network everyone' NC100U-WM) stuck it in the computer & everything worked fine. just recently--the internet stopped working again. & i'm completely losted as to why... additional points of interest...

recently saw an error in ubuntu during start up (uevent no buffer space available) but- after i saw the error- internet was still working.. no problems... but it was the next time i started up after that- that the internet stopped (so *maybe* it has something to do with it..)

both cards (realtek & NC100U-WM) use different driver- realtek is 'forcedeth' & the NC100U is 'tulip'

slackware can still connect to the internet (using either card..) -it's ubuntu that gets stopped up.

there's no windows on this computer... so in short.. i appear to have a network problem that's

OS related
is not driver related
& possibly the result of switching between linux kernels

any help would be greatly appreciated- thank you...

additional information....

eth1 Link encap:Ethernet HWaddr 00:1a:70:13:a7:11
inet6 addr: xxxx::xxx:xxxx:xxxx:xxxx/xx Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9 errors:0 dropped:0 overruns:0 frame:0
TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4580 (4.4 KB) TX bytes:5940 (5.8 KB)
Interrupt:5 Base address:0xbc00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2338 errors:0 dropped:0 overruns:0 frame:0
TX packets:2338 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:116900 (114.1 KB) TX bytes:116900 (114.1 KB)


exspastic@monster:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
exspastic@monster:~$ nslookup linuxquestions.org
;; connection timed out; no servers could be reached

not good at trouble shooting this stuff- shouldn't i have an inet address for eth1?

SLACKWARE VERSION (which has an inet address..)

eth1 Link encap:Ethernet HWaddr 00:1A:70:13:A7:11
inet addr:xx.xx.xxx.xxx Bcast:xx.xx.xxx.xxx Mask:xxx.xxx.xxx.x
inet6 addr: xxxx::xxx:xxxx:xxxx:xxxx/xx Scope:Link
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:883 errors:0 dropped:0 overruns:0 frame:0
TX packets:858 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:713652 (696.9 KiB) TX bytes:118269 (115.4 KiB)
Interrupt:5

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

(to all reading- i crossed out certain information..)

thanks- am confused- any help would be welcomed!

um.. anybody got any ideas on how i can fix this? um- thanks.. i'm really stumped over here..

First make sure Ubuntu is not renaming your interfaces (eth0 one time, eth1 on another boot).

Then see what happens when you disable IPv6 - edit /etc/modprobe.d/aliases and find the lines with 'ipv6' and 'net-pf-10' - copy them and comment out one copy, and change the active copy to:

alias net-pf-10 off
alias ipv6 off

(will try & thank you for replying!)



i type

ifconfig eth0 xx.xx.xxx.xxx netmask 255.255.240.0 up
ifconfig eth0


setting the inet address- lights blink... no connection.

killall networking...
start networking...

still no connection

ifdown eth1
ifup eth1

no connection...

if i mess with this stuff too much & do 'ifconfig' i find that my inet address has disappeared again...

physically turn the dsl off & on a few times- by step & repeat- no connect.. the light occasionally blinks- but no go.

did do all this stuff & after turning the dsl back- started firefox & tried yahoo... got a blank with screen... blinking lights.. but alas- it just hung there & eventually i got the dreaded 'can't connect' 'try again' thing.

why does my inet address keep disappearing?

still no go...


/etc/modprobe.d/aliases currently looks like this...




# These are the standard aliases for devices and kernel drivers.
# This file does not need to be modified.
#
# Please file a bug against module-init-tools if a package needs a entry
# in this file.

# network protocols ##########################################################
alias net-pf-1 unix
alias net-pf-2 ipv4
alias net-pf-3 ax25
alias net-pf-4 ipx
alias net-pf-5 appletalk
alias net-pf-6 netrom
alias net-pf-7 bridge
alias net-pf-8 atm
alias net-pf-9 x25
#alias net-pf-10 ipv6
alias net-pf-11 rose
alias net-pf-12 decnet
alias net-pf-10 off
alias ipv6 off
# 13 NETBEUI
alias net-pf-15 af_key
alias net-pf-16 af_netlink
alias net-pf-17 af_packet
# 18 ASH
alias net-pf-19 af_econet
alias net-pf-20 atm
# 22 SNA
alias net-pf-23 irda
alias net-pf-24 pppoe
alias net-pf-25 wanrouter
alias net-pf-26 llc
alias net-pf-31 bluetooth

alias net-pf-16-proto-1 wire
alias net-pf-16-proto-3 ip_queue
alias net-pf-16-proto-4 tcp_diag
alias net-pf-16-proto-8 scsi_transport_iscsi
alias net-pf-16-proto-9 audit
alias net-pf-16-proto-11 cn
alias net-pf-16-proto-13 ip6_queue

# executables formats ########################################################
install binfmt-0000 /bin/true
alias binfmt-204 binfmt_aout
alias binfmt-263 binfmt_aout
alias binfmt-264 binfmt_aout
alias binfmt-267 binfmt_aout
alias binfmt-387 binfmt_aout

# block devices ##############################################################
alias block-major-3-* ide_generic
alias block-major-8-* sd_mod
alias block-major-9-* md
alias block-major-11-* sr_mod
alias block-major-22-* ide_generic
alias block-major-33-* ide_generic
alias block-major-34-* ide_generic
alias block-major-37-* ide_tape
alias block-major-44-* ftl
alias block-major-46-* pcd
alias block-major-47-* pf
alias block-major-56-* ide_generic
alias block-major-57-* ide_generic
alias block-major-58-* lvm_mod
alias block-major-88-* ide_generic
alias block-major-89-* ide_generic
alias block-major-90-* ide_generic
alias block-major-91-* ide_generic
alias block-major-93-* nftl
alias block-major-97-* pg

# character devices ##########################################################
alias char-major-9-* st
alias char-major-10-1 psmouse
alias char-major-10-139 openprom
alias char-major-10-157 applicom
alias char-major-10-181 toshiba
alias char-major-10-183 hw_random
alias char-major-10-187 irnet
alias char-major-10-189 ussp
alias char-major-10-250 hci_vhci
alias char-major-13-0 joydev
alias char-major-13-1 joydev
alias char-major-13-2 joydev
alias char-major-13-3 joydev
alias char-major-13-32 mousedev
alias char-major-13-33 mousedev
alias char-major-13-34 mousedev
alias char-major-13-35 mousedev
alias char-major-13-63 mousedev
alias char-major-13-64 evdev
alias char-major-13-65 evdev
alias char-major-13-66 evdev
alias char-major-13-67 evdev
alias char-major-19-* cyclades
alias char-major-20-* cyclades
alias char-major-22-* pcxx
alias char-major-23-* pcxx
alias char-major-27-* ftape
alias char-major-34-* scc
alias char-major-35-* tclmidi
alias char-major-48-* riscom8
alias char-major-49-* riscom8
alias char-major-57-* esp
alias char-major-58-* esp
alias char-major-63-* kdebug
alias char-major-67-* coda
alias char-major-75-* specialix
alias char-major-76-* specialix
alias char-major-81-* videodev
alias char-major-83-* vtx
alias char-major-89-* i2c_dev
alias char-major-90-* mtdchar
alias char-major-96-* pt
alias char-major-97-* pg
alias char-major-107-* 3dfx
alias char-major-109-* lvm_mod
alias char-major-166-* cdc_acm
alias char-major-171-0 raw1394
alias char-major-171-1 video1394
alias char-major-171-2 dv1394
alias char-major-171-3 amdtp
alias char-major-180-* usbcore
alias char-major-195-* nvidia
alias char-major-200-* vxspec
alias char-major-202-* msr
alias char-major-203-* cpuid
alias char-major-206-* osst
alias char-major-208-* ussp
alias char-major-227-* tub3270
#alias char-major-240-* usb-serial
#alias char-major-240-* hsfserial
#alias char-major-241-* hsfserial

# misc #######################################################################
alias xfrm-type-2-4 xfrm4_tunnel
alias xfrm-type-2-50 esp4
alias xfrm-type-2-51 ah4
alias xfrm-type-2-108 ipcomp
alias xfrm-type-10-41 xfrm6_tunnel
alias xfrm-type-10-50 esp6
alias xfrm-type-10-51 ah6
alias xfrm-type-10-108 ipcomp6

alias bt-proto-0 l2cap
alias bt-proto-2 sco
alias bt-proto-3 rfcomm
alias bt-proto-4 bnep
alias bt-proto-5 cmtp
alias bt-proto-6 hidp
alias bt-proto-7 avdtp

alias cipcb0 cipcb
alias cipcb1 cipcb
alias cipcb2 cipcb
alias cipcb3 cipcb
alias dummy0 dummy
alias dummy1 dummy
alias plip0 plip
alias plip1 plip
alias slip0 slip
alias slip1 slip
alias tunl0 ipip
alias gre0 ip_gre

alias usbdevfs usbcore




i commented out 'alias net-pf-10 ipv6' didn't find any lines that just said 'ipv6' restarted the computer & everything... did the 'ifconfig' stuff again- inet address is still disappearing. ifconfig on both slackware & ubuntu comes up eth1. & i commented out eth0 stuff out in /etc/network/interfaces & left the 'eth1' stuff in (thinking the eth0 stuff might have been causing the error..) no go.

How bizarre. Did you look in /var/log/dmesg and 'messages' to see if the driver is printing out any lines telling you that it is confused? I haven't seen this sort of thing since a buggy ethernet driver back in 2002.

did find one thing that looked interesting in var/log/dmesg


44.681153] udev: renamed network interface eth0 to eth1


thing is.. everytime i type ifconfig it comes up as eth1. i'm not sure if this is 'normal' behavior or not...eth0 is the card that's built into the motherboard..(i have eth0 turned off in the bios) the message files & dmesg files are rather long- if you want the whole file- i can post them.. otherwise here i few things that i had copied from those files also (that may or may not be of interest..)



27.568849] Linux Tulip driver version 1.1.15 (Feb 27, 2007)
[ 27.733962] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 27.737841] ata3.00: ATA-7: WDC WD4000KD-00NAB0, 01.06A01, max UDMA/133
[ 27.737843] ata3.00: 781422768 sectors, multi 16: LBA48 NCQ (depth 31/32)
[ 27.744819] ata3.00: configured for UDMA/133

[ 28.157668] tulip0: MII transceiver #1 config 1000 status 786d advertising 05e1.
[ 28.158107] PCI: Setting latency timer of device 0000:00:06.0 to 64
[ 28.162369] eth0: ADMtek Comet rev 17 at Port 0xbc00, 00:1a:70:13:a7:11, IRQ 5.
[ 28.164666] pata_amd 0000:00:06.0: version 0.3.10
[ 28.164708] PCI: Setting latency timer of device 0000:00:06.0 to 64


29.228549] USB Mass Storage support registered.
[ 29.489673] usb 1-1: new low speed USB device using ohci_hcd and address 6
[ 29.534490] ata6.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
[ 29.534495] ata6.00: BMDMA stat 0x64
[ 29.534501] ata6.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
[ 29.534502] res 51/84:01:07:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
[ 29.534504] ata6.00: status: { DRDY ERR }
[ 29.534506] ata6.00: error: { ICRC ABRT }
[ 29.534522] ata6: soft resetting link
[ 29.678312] usb 1-1: configuration #1 chosen from 1 choice
[ 29.688345] input: Logitech Optical USB Mouse as /devices/pci0000:00/0000:00:02.0/usb1/1-1/1-1:1.0/input/input4
[ 29.696764] input,hidraw0: USB HID v1.10 Mouse [Logitech Optical USB Mouse] on usb-0000:00:02.0-1
[ 29.778279] ata6.00: configured for UDMA/100
[ 29.778294] ata6: EH complete
[ 29.957463] usb 1-2: new full speed USB device using ohci_hcd and address 7
[ 30.157752] usb 1-2: configuration #1 chosen from 1 choice
[ 30.160505] scsi7 : SCSI emulation for USB Mass Storage devices
[ 30.160652] usb-storage: device found at 7
[ 30.160654] usb-storage: waiting for device to settle before scanning
[ 30.421326] usb 1-3: new full speed USB device using ohci_hcd and address 8
[ 30.448730] ata6.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
[ 30.448733] ata6.00: BMDMA stat 0x64
[ 30.448738] ata6.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
[ 30.448739] res 51/84:01:07:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
[ 30.448741] ata6.00: status: { DRDY ERR }
[ 30.448743] ata6.00: error: { ICRC ABRT }
[ 30.448759] ata6: soft resetting link
[ 30.601263] usb 1-3: configuration #1 chosen from 1 choice
[ 30.691400] ata6.00: configured for UDMA/100
[ 30.691415] ata6: EH complete
[ 30.864577] usb 1-4: new low speed USB device using ohci_hcd and address 9
[ 31.051751] usb 1-4: configuration #1 chosen from 1 choice
[ 31.061822] input: USB-compliant keyboard as /devices/pci0000:00/0000:00:02.0/usb1/1-4/1-4:1.0/input/input5
[ 31.069433] input,hidraw1: USB HID v1.10 Keyboard [USB-compliant keyboard] on usb-0000:00:02.0-4
[ 31.077876] input: USB-compliant keyboard as /devices/pci0000:00/0000:00:02.0/usb1/1-4/1-4:1.1/input/input6
[ 31.092411] input,hiddev96,hidraw2: USB HID v1.10 Mouse [USB-compliant keyboard] on usb-0000:00:02.0-4
[ 31.369293] ata6.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
[ 31.369299] ata6.00: BMDMA stat 0x64
[ 31.369304] ata6.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
[ 31.369305] res 51/84:01:07:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
[ 31.369307] ata6.00: status: { DRDY ERR }
[ 31.369309] ata6.00: error: { ICRC ABRT }
[ 31.369325] ata6: soft resetting link
[ 31.612502] ata6.00: configured for UDMA/100
[ 31.612515] ata6: EH complete
[ 32.272469] ata6.00: limiting speed to UDMA/66:PIO4
[ 32.272475] ata6.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2
[ 32.272477] ata6.00: BMDMA stat 0x64
[ 32.272482] ata6.00: cmd c8/00:08:00:00:00/00:00:00:00:00/e0 tag 0 dma 4096 in
[ 32.272483] res 51/84:01:07:00:00/00:00:00:00:00/e0 Emask 0x10 (ATA bus error)
[ 32.272486] ata6.00: status: { DRDY ERR }
[ 32.272488] ata6.00: error: { ICRC ABRT }
[ 32.272520] ata6: soft resetting link
[ 32.517602] ata6.00: configured for UDMA/66
[ 32.517616] ata6: EH complete

44.681153] udev: renamed network interface eth0 to eth1






25.119795] system 00:01: ioport range 0x1000-0x107f has been reserved
May 26 10:11:58 monster kernel: [ 25.119797] system 00:01: ioport range 0x1080-0x10ff has been reserved
May 26 10:11:58 monster kernel: [ 25.119799] system 00:01: ioport range 0x1400-0x147f has been reserved
May 26 10:11:58 monster kernel: [ 25.119802] system 00:01: ioport range 0x1480-0x14ff has been reserved
May 26 10:11:58 monster kernel: [ 25.119804] system 00:01: ioport range 0x1800-0x187f has been reserved
May 26 10:11:58 monster kernel: [ 25.119806] system 00:01: ioport range 0x1880-0x18ff has been reserved
May 26 10:11:58 monster kernel: [ 25.119809] system 00:01: iomem range 0x0-0x0 could not be reserved
May 26 10:11:58 monster kernel: [ 25.119813] system 00:02: ioport range 0x4d0-0x4d1 has been reserved
May 26 10:11:58 monster kernel: [ 25.119816] system 00:02: ioport range 0x800-0x87f has been reserved
May 26 10:11:58 monster kernel: [ 25.119818] system 00:02: ioport range 0x290-0x297 has been reserved
May 26 10:11:58 monster kernel: [ 25.119826] system 00:0a: iomem range 0xe0000000-0xefffffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119831] system 00:0b: iomem range 0xf0000-0xfffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119834] system 00:0b: iomem range 0x7fff0000-0x7fffffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119836] system 00:0b: iomem range 0xffff0000-0xffffffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119838] system 00:0b: iomem range 0x0-0x9ffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119841] system 00:0b: iomem range 0x100000-0x7ffeffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119843] system 00:0b: iomem range 0xfec00000-0xfec00fff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119846] system 00:0b: iomem range 0xfee00000-0xfeefffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119848] system 00:0b: iomem range 0xfefff000-0xfeffffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119851] system 00:0b: iomem range 0xfff80000-0xfff80fff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119853] system 00:0b: iomem range 0xfff90000-0xfffbffff could not be reserved
May 26 10:11:58 monster kernel: [ 25.119856] system 00:0b: iomem range 0xfffed000-0xfffeffff could not be reserved





May 26 10:11:58 monster kernel: [ 25.184852] IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
May 26 10:11:58 monster kernel: [ 25.185101] TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
May 26 10:11:58 monster kernel: [ 25.185742] TCP bind hash table entries: 65536 (order: 9, 2359296 bytes)
May 26 10:11:58 monster kernel: [ 25.186725] TCP: Hash tables configured (established 131072 bind 65536)
May 26 10:11:58 monster kernel: [ 25.186729] TCP reno registered
May 26 10:11:58 monster kernel: [ 25.197917] checking if image is initramfs... it is
May 26 10:11:58 monster kernel: [ 25.698969] Freeing initrd memory: 7357k freed
May 26 10:11:58 monster kernel: [ 25.699702] audit: initializing netlink socket (disabled)
May 26 10:11:58 monster kernel: [ 25.699715] audit(1211814687.105:1): initialized
May 26 10:11:58 m




May 26 10:11:58 monster kernel: [ 53.179131] eth1: Setting full-duplex based on MII#1 link partner capability of 41e1.
May 26 10:11:58 monster kernel: [ 53.956285] NET: Registered protocol family 10
May 26 10:11:58 monster kernel: [ 53.956508] lo: Disabled Privacy Extensions
May 26 10:11:58 monster kernel: [ 54.378593] No dock devices found.





also- we are talking about 2 differnt lan cards here that this has happened to... a Realtek 8201CL PHY that built into the motherboard & a network everyone NC100U ...both have different drivers (realtek= forcedeth... nc100u=tulip)


...or is forcedeth the driver for my DSL modem? anyways- not sure it's the same driver.. the realtek lan built into the motherboard is turned off in the bios....

http://forums.xandros.com/viewtopic.php?t=21645

also if any help... this is my motherboard...

http://www.newegg.com/product/produc...82E16813135028

okay- this is weird...

figured i'd try something--- switched back to the built in lan... turned it back on in the bios, & i'm in ubuntu & have internet again.. so it's gotta be something about how slackware leaves the lan- don't understand what it is.. but in otherwords- if i were to use slackware right now & get on the net.. sometimes when i log off- slackware is leaving the lan in a certain state (what it's doing- i have no idea..) -but whatever slackware has done to the lan- ubuntu doesn't like it when it starts- & i end up with no connection. (--or it could be the speedstream dsl modem too... now that i think of it..) so currently- the only way for me to get on the net with both distros is to switch lan cards? very confused....

It could have something to do with the router - or with slackware.

Did you try:
1. pull the ethernet cable out (should force both sides to drop the connection)
2. 'ifdown eth1' (bring down eth1)
3. plug in the ethernet cable
4. 'ifup eth1'

If that works, then you may have a 'stale' lease (and a silly router that doesn't drop the old lease and renew) - see if you can configure the router to always assign the same IP number to that machine (specifically, to the MAC on the ethernet port that you want to connect with). You may want to give things a kick start by bringing the interface down then tweaking /var/lib/dhcp/dhclient.leases and putting in that fixed IP number - so even if DHCP goes funny, it will attempt to use that fixed number rather than whatever random number was given before.

Another sign of a problem with the router is if the following also fixes things (although admittedly, it could be bad behavior on the part of the attached computer that gets the router in a bad state - but I still consider that poor design on the router) :
1. bring down interface (ifdown eth1)
2. reset the router (and wait until it is up and running again)
3. ifup eth1