eth connection

[carlo]

Hi all
it's a while that when i login i cannot connect to internet, at first i thought twas a router/modem issue, even because i can access modem and router ips while internet no
but to be short, i've tried to disable cabled connection from panel thingy and re enable it and i can go to the internet
i think there's some conflict or maybe some demon which has to be delayed a bit.. any hint?

[pavroo]

Try to up the interface manually:

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su
ifconfig
Find what is your device (e.g. eth0, eth1, or so), then:

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ifdown eth0
ifup eth0
If no success, reboot your router and your machine after.

[carlo]

uh..... i don-t think i-ve had the feedback i should have had.,...

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$ su
Password:
root@linuxschifo:/home/carlo# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.64  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::922b:34ff:fe31:c8a9  prefixlen 64  scopeid 0x20<link>
        ether 90:2b:34:31:c8:a9  txqueuelen 1000  (Ethernet)
        RX packets 18239  bytes 13747188 (13.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15575  bytes 3002692 (2.8 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 1  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 1746  bytes 138338 (135.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1746  bytes 138338 (135.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@linuxschifo:/home/carlo# ifdown eth0
Unknown interface eth0


[pavroo]

Your eth0 interface is up, it recived some packages, no errors.
The problem must be somwhere else...
Are you sure your router is fine?

[carlo]

i mean
first it told me:

root@linuxschifo:/home/carlo# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
then

root@linuxschifo:/home/carlo# ifdown eth0
Unknown interface eth0

now that i-ve rebooted i-ve tried again and this is the outcome:

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root@linuxschifo:/home/carlo# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.64  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::922b:34ff:fe31:c8a9  prefixlen 64  scopeid 0x20<link>
        ether 90:2b:34:31:c8:a9  txqueuelen 1000  (Ethernet)
        RX packets 313  bytes 183069 (178.7 KiB)
        RX errors 0  dropped 2  overruns 0  frame 0
        TX packets 208  bytes 36083 (35.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 1  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1  (Local Loopback)
        RX packets 1215  bytes 96658 (94.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1215  bytes 96658 (94.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@linuxschifo:/home/carlo# ifconfig eth0 down
root@linuxschifo:/home/carlo# ifconfig eth0 up
root@linuxschifo:/home/carlo#


useless to add that i couldn-t link to the internet and hat to turn cabled connection off and on from the cinnamon panel thingy

Are you sure your router is fine?

i-m not very sure cause besides linux things i have updated router firmare as well lately, but even reverting to an older fw didnt help

what i-ve noticed is that from this very computer linux behaves this way, even with different accounts, if i start windows internet worlks properly, if i link wireless to the router it works as well

[pavroo]

Show me:

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cat /etc/network/interfaces
cat /etc/resolv.conf
systemctl status network-manager
lspci -v
dmesg | grep net


[carlo]

this is what i get after i have done the trick with the utility, tell me if you need me to do it as soon as i reboot as well, here you gooo!

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$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

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$ cat /etc/resolv.conf
# Generated by NetworkManager
search lan
nameserver 192.168.1.254
nameserver 62.101.93.101
nameserver 83.103.25.250
# NOTE: the libc resolver may not support more than 3 nameservers.
# The nameservers listed below may not be recognized.
nameserver fe80::9e97:26ff:feb8:8a52%eth0

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$ systemctl status network-manager
● NetworkManager.service - Network Manager
   Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
   Active: active (running) since mar 2016-04-12 13:38:04 CEST; 1h 23min ago
Main PID: 741 (NetworkManager)
    Tasks: 4 (limit: 512)
   CGroup: /system.slice/NetworkManager.service
           ├─ 741 /usr/sbin/NetworkManager --no-daemon
           └─1621 /sbin/dhclient -d -q -sf /usr/lib/NetworkManager/nm-dhcp-helper -pf /var/run/dhclie

apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9008]   plen 24 (255.255.255.0)
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   gateway 192.168.1.254
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   server identifier 192.16
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   lease time 3600
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   nameserver '192.168.1.25
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   nameserver '62.101.93.10
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   nameserver '83.103.25.25
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011]   domain name 'lan'
apr 12 14:35:01 linuxschifo NetworkManager[741]: <info>  [1460464501.9011] dhcp4 (eth0): state change
apr 12 14:35:01 linuxschifo dhclient[1621]: bound to 192.168.1.64 -- renewal in 1786 seconds.
lines 1-19/19 (END)

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$ lspci -v
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller (rev 09)
        Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller
        Flags: bus master, fast devsel, latency 0
        Capabilities: <access denied>
        Kernel driver in use: ivb_uncore
        Kernel modules: ie31200_edac

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 24
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 0000e000-0000efff
        Memory behind bridge: f6000000-f70fffff
        Prefetchable memory behind bridge: 00000000e0000000-00000000f1ffffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport
        Kernel modules: shpchp

00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) (prog-if 30 [XHCI])
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family USB xHCI Host Controller
        Flags: bus master, medium devsel, latency 0, IRQ 25
        Memory at f7400000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci

00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family MEI Controller
        Flags: bus master, fast devsel, latency 0, IRQ 29
        Memory at f741a000 (64-bit, non-prefetchable) [size=16]
        Capabilities: <access denied>
        Kernel driver in use: mei_me
        Kernel modules: mei_me

00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI])
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family USB Enhanced Host Controller
        Flags: bus master, medium devsel, latency 0, IRQ 16
        Memory at f7418000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ehci-pci
        Kernel modules: ehci_pci

00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family High Definition Audio Controller
        Flags: bus master, fast devsel, latency 0, IRQ 30
        Memory at f7410000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
        Capabilities: <access denied>
        Kernel driver in use: pcieport
        Kernel modules: shpchp

00:1c.4 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 5 (rev c4) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
        Memory behind bridge: f7300000-f73fffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport
        Kernel modules: shpchp

00:1c.5 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c4) (prog-if 01 [Subtractive decode])
        Flags: bus master, fast devsel, latency 0, IRQ 10
        Bus: primary=00, secondary=04, subordinate=05, sec-latency=0
        Capabilities: <access denied>

00:1c.6 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 7 (rev c4) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 18
        Bus: primary=00, secondary=06, subordinate=06, sec-latency=0
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: f7200000-f72fffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport
        Kernel modules: shpchp

00:1c.7 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 8 (rev c4) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 19
        Bus: primary=00, secondary=07, subordinate=07, sec-latency=0
        I/O behind bridge: 0000c000-0000cfff
        Memory behind bridge: f7100000-f71fffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport
        Kernel modules: shpchp

00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI])
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family USB Enhanced Host Controller
        Flags: bus master, medium devsel, latency 0, IRQ 23
        Memory at f7417000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ehci-pci
        Kernel modules: ehci_pci

00:1f.0 ISA bridge: Intel Corporation Z77 Express Chipset LPC Controller (rev 04)
        Subsystem: Gigabyte Technology Co., Ltd Z77 Express Chipset LPC Controller
        Flags: bus master, medium devsel, latency 0
        Capabilities: <access denied>
        Kernel driver in use: lpc_ich
        Kernel modules: lpc_ich

00:1f.2 RAID bus controller: Intel Corporation SATA Controller [RAID mode] (rev 04)
        Subsystem: Gigabyte Technology Co., Ltd SATA Controller [RAID mode]
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 26
        I/O ports at f070 [size=8]
        I/O ports at f060 [size=4]
        I/O ports at f050 [size=8]
        I/O ports at f040 [size=4]
        I/O ports at f020 [size=32]
        Memory at f7416000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: <access denied>
        Kernel driver in use: ahci
        Kernel modules: ahci

00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
        Subsystem: Gigabyte Technology Co., Ltd 7 Series/C210 Series Chipset Family SMBus Controller
        Flags: medium devsel
        Memory at f7415000 (64-bit, non-prefetchable) [size=256]
        I/O ports at f000 [size=32]
        Kernel modules: i2c_i801

01:00.0 VGA compatible controller: NVIDIA Corporation GM206 [GeForce GTX 960] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: eVga.com. Corp. GM206 [GeForce GTX 960]
        Flags: bus master, fast devsel, latency 0, IRQ 32
        Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Memory at f0000000 (64-bit, prefetchable) [size=32M]
        I/O ports at e000 [size=128]
        [virtual] Expansion ROM at f7000000 [disabled] [size=512K]
        Capabilities: <access denied>
        Kernel driver in use: nvidia
        Kernel modules: nvidia

01:00.1 Audio device: NVIDIA Corporation Device 0fba (rev a1)
        Subsystem: eVga.com. Corp. Device 3968
        Flags: bus master, fast devsel, latency 0, IRQ 17
        Memory at f7080000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel

03:00.0 USB controller: VIA Technologies, Inc. VL80x xHCI USB 3.0 Controller (rev 03) (prog-if 30 [XHCI])
        Subsystem: Gigabyte Technology Co., Ltd VL80x xHCI USB 3.0 Controller
        Flags: bus master, fast devsel, latency 0, IRQ 27
        Memory at f7300000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: <access denied>
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci

04:00.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 30) (prog-if 01 [Subtractive decode])
        Flags: bus master, fast devsel, latency 0, IRQ 10
        Bus: primary=04, secondary=05, subordinate=05, sec-latency=64
        Capabilities: <access denied>

06:00.0 Ethernet controller: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet (rev c0)
        Subsystem: Gigabyte Technology Co., Ltd AR8151 v2.0 Gigabit Ethernet
        Flags: bus master, fast devsel, latency 0, IRQ 31
        Memory at f7200000 (64-bit, non-prefetchable) [size=256K]
        I/O ports at d000 [size=128]
        Capabilities: <access denied>
        Kernel driver in use: atl1c
        Kernel modules: atl1c

07:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9172 SATA 6Gb/s Controller (rev 11) (prog-if 01 [AHCI 1.0])
        Subsystem: Gigabyte Technology Co., Ltd 88SE9172 SATA 6Gb/s Controller
        Flags: bus master, fast devsel, latency 0, IRQ 28
        I/O ports at c040 [size=8]
        I/O ports at c030 [size=4]
        I/O ports at c020 [size=8]
        I/O ports at c010 [size=4]
        I/O ports at c000 [size=16]
        Memory at f7110000 (32-bit, non-prefetchable) [size=512]
        Expansion ROM at f7100000 [disabled] [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: ahci
        Kernel modules: ahci

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$ dmesg | grep net
[    0.008189] Initializing cgroup subsys net_cls
[    0.008192] Initializing cgroup subsys net_prio
[    0.593246] audit: initializing netlink subsys (disabled)
[    0.597475] microcode: Microcode Update Driver: v2.01 <tigran@aivazian.fsnet.co.uk>, Peter Oruba

[pavroo]

Try:
1.

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sudo su
mv /etc/resolv.conf /etc/resolv.conf.back
nano /etc/resolv.conf
and paste:

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nameserver 62.179.1.60
nameserver 62.179.1.61

then save it.
2.

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modprobe -r atl1c
if no error than:

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modprobe atl1c
Check is the module loaded:

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lsmod | grep atl1c

Than:

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ifconfig eth0 down
ifconfig eth0 up

[carlo]

mm
seems that nothing has changed


(what did i do to my computer?)

[pavroo]

What kernel?
Have installed Sparky kernel or just default's Debian?

[carlo]

i-ve got not a clue,
this is my uname -a:

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Linux linuxschifo 4.4.0-1-amd64 #1 SMP Debian 4.4.6-1 (2016-03-17) x86_64 GNU/Linux


[carlo]

half a good new:
i-ve activated sparky testing repos,
installed the kernel package, rebooted and goodbye X (i think it could be nvidia drivers fault)
i logged from textual and could upgrade whole system
the i've rebooted and X didn't start either
so
now i've used the "old" debian kernel and X works and Net as well!

no.. debian testing kernel, graphic session, but somehow locked internet connection yet

[NexusPenguin]

Hi Carlo,

If your problem isn't solved by now, I would throw in my own suggestions, even though I am no Linux/Network pro...

My question is pretty simple : have you entered a DNS server ?
I can't tell with this distro, but I know of some OS'es that will refuse to the internet until you have specified the correct DNS server (maybe your router or something more general, like 8.8.8.8 and "google.com" as a domain...).

Regards.

[carlo]

actually i didn't touch the dns settings at all
the onlu thing i did was installing privoxy, but so far it gave no problem
i suspect there's some conflict between desktop environments tools......

odd thing is that one time out of ten connection works without any intervention of mine (like now)

[NexusPenguin]

Hi Carlo,

OK. But it's an easy check, so maybe it's worth giving it a look even if you didn't touch anything.

I reckon you probably have other devices that are networked : a printer, a NAS, a router or an ISP box.
Are you able to reach those ?

It's just to check if it's a LAN or WAN problem...

Regards.

FRED