I installed ubuntu14.04LTS in LenovoG510(4th gen intel i5 processor, 4G, 500HD, 2.5GH,). Very often(every 30 minutes) wired connection lost and will be restored only when system is rebooted. And also durind file sharing from server, downloads from dc++ system freezes completely and have to hard power off. Here are the outputs of few commands run when connection lost.

[prav]

dmesg | tail
[ 414.101890] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.102104] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.102310] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.102510] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.102713] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.102918] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.103124] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.103334] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.103533] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting
[ 414.103742] alx 0000:03:00.0 eth0: fatal interrupt 0x4019607, resetting

lsb_release -a
        No LSB modules are available.
        Distributor ID: Ubuntu
        Description: Ubuntu 14.04 LTS
        Release: 14.04
        Codename: trusty

uname -a
         Linux praveen 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

ifconfig -a
eth0 Link encap:Ethernet HWaddr 20:89:84:f5:37:81
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:13 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
          Interrupt:18

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:65536 Metric:1
          RX packets:880 errors:0 dropped:0 overruns:0 frame:0
          TX packets:880 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:180931 (180.9 KB) TX bytes:180931 (180.9 KB)

wlan0 Link encap:Ethernet HWaddr 48:d2:24:a4:bd:3d
          UP BROADCAST MULTICAST MTU:1500 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:1000
          RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

netstat -rn
        Kernel IP routing table
        Destination Gateway Genmask Flags MSS Window irtt Iface

sudo lshw -c network
  *-network
       description: Wireless interface
       product: AR9485 Wireless Network Adapter
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: 01
       serial: 48:d2:24:a4:bd:3d
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=3.13.0-29-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
       resources: irq:17 memory:b0500000-b057ffff memory:9ff00000-9ff0ffff
  *-network
       description: Ethernet interface
       product: QCA8172 Fast Ethernet
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: eth0
       version: 10
       serial: 20:89:84:f5:37:81
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi msix cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=alx latency=0 link=no multicast=yes port=twisted pair
       resources: irq:46 memory:b0400000-b043ffff ioport:3000(size=128)

cat /etc/network/interfaces
       # interfaces(5) file used by ifup(8) and ifdown(8)
        auto lo
        iface lo inet loopback

       plugins=ifupdown,keyfile,ofono
       dns=dnsmasq

        no-auto-default=20:89:84:F5:37:81,

        [ifupdown]
        managed=false

cat /var/lib/NetworkManager/NetworkManager.state
[main]
        NetworkingEnabled=true
        WirelessEnabled=true
        WWANEnabled=true
        WimaxEnabled=true

version.log
Ubuntu 3.13.0-29.53-generic 3.13.11.2

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-29-generic 3.13.0-29.53
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: praveen 1893 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Jun 17 12:34:23 2014
HibernationDevice: RESUME=UUID=6c75982b-cf47-4ea8-bad6-43fc8d86c37e
InstallationDate: Installed on 2014-06-16 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 20238
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic.efi.signed root=UUID=ec684e9d-97f7-41c0-a0bc-bfe8604345d4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-29-generic N/A
 linux-backports-modules-3.13.0-29-generic N/A
 linux-firmware 1.127.2
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/16/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 79CN29WW(V1.13)
dmi.board.asset.tag: No Asset Tag
dmi.board.name: INVALID
dmi.board.vendor: LENOVO
dmi.board.version: 31900004WIN8 STD SGL
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo G510
dmi.modalias: dmi:bvnLENOVO:bvr79CN29WW(V1.13):bd07/16/2013:svnLENOVO:pn20238:pvrLenovoG510:rvnLENOVO:rnINVALID:rvr31900004WIN8STDSGL:cvnLENOVO:ct10:cvrLenovoG510:
dmi.product.name: 20238
dmi.product.version: Lenovo G510
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[prav (pravenbr)]

Further to add i gave it a try to new latest kernel version 3.14-generic. Then tried copy files from server but still system freeze happend.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.15 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-utopic/

[prav (pravenbr)]

I could not test the upstream kernel. Some dependencies issues. Will try testing again.
Thanks

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]