Christopher, no issues with before upgrading to 15.10. A few days after the upgrade I noticed that the Laptop freezes from time to time and sometimes does not suspend, when I close the lid. That looks like an ACPI issue for me.
I am currently travelling abroad, so my options to reinstall or debug are limited. Do you have any idea, how I could get the ethernet interface working? I played a bit around and noticed that network interface is working from for a few seconds now and then. Looking at ping output, there are between 20 and 50 seconds "downtime" and meik@meik-Latitude-E7440:~$ ping 10.32.6.240 PING 10.32.6.240 (10.32.6.240) 56(84) bytes of data. 64 bytes from 10.32.6.240: icmp_seq=1 ttl=255 time=23.5 ms 64 bytes from 10.32.6.240: icmp_seq=2 ttl=255 time=7.20 ms 64 bytes from 10.32.6.240: icmp_seq=3 ttl=255 time=24.0 ms 64 bytes from 10.32.6.240: icmp_seq=43 ttl=255 time=1.28 ms 64 bytes from 10.32.6.240: icmp_seq=44 ttl=255 time=27.8 ms 64 bytes from 10.32.6.240: icmp_seq=45 ttl=255 time=1.89 ms 64 bytes from 10.32.6.240: icmp_seq=46 ttl=255 time=10.0 ms 64 bytes from 10.32.6.240: icmp_seq=47 ttl=255 time=0.895 ms 64 bytes from 10.32.6.240: icmp_seq=48 ttl=255 time=16.5 ms 64 bytes from 10.32.6.240: icmp_seq=49 ttl=255 time=0.897 ms 64 bytes from 10.32.6.240: icmp_seq=50 ttl=255 time=4.63 ms 64 bytes from 10.32.6.240: icmp_seq=51 ttl=255 time=0.910 ms 64 bytes from 10.32.6.240: icmp_seq=52 ttl=255 time=24.8 ms 64 bytes from 10.32.6.240: icmp_seq=53 ttl=255 time=1.84 ms 64 bytes from 10.32.6.240: icmp_seq=54 ttl=255 time=4.45 ms 64 bytes from 10.32.6.240: icmp_seq=90 ttl=255 time=6.40 ms 64 bytes from 10.32.6.240: icmp_seq=91 ttl=255 time=3.99 ms 64 bytes from 10.32.6.240: icmp_seq=92 ttl=255 time=0.821 ms 64 bytes from 10.32.6.240: icmp_seq=93 ttl=255 time=0.856 ms 64 bytes from 10.32.6.240: icmp_seq=94 ttl=255 time=0.875 ms 64 bytes from 10.32.6.240: icmp_seq=141 ttl=255 time=0.878 ms 64 bytes from 10.32.6.240: icmp_seq=142 ttl=255 time=1.08 ms 64 bytes from 10.32.6.240: icmp_seq=143 ttl=255 time=0.909 ms 64 bytes from 10.32.6.240: icmp_seq=144 ttl=255 time=0.914 ms 64 bytes from 10.32.6.240: icmp_seq=145 ttl=255 time=0.890 ms 64 bytes from 10.32.6.240: icmp_seq=146 ttl=255 time=0.877 ms 64 bytes from 10.32.6.240: icmp_seq=147 ttl=255 time=0.965 ms 64 bytes from 10.32.6.240: icmp_seq=148 ttl=255 time=0.816 ms 64 bytes from 10.32.6.240: icmp_seq=149 ttl=255 time=0.880 ms 64 bytes from 10.32.6.240: icmp_seq=150 ttl=255 time=0.879 ms 64 bytes from 10.32.6.240: icmp_seq=151 ttl=255 time=11.2 ms 64 bytes from 10.32.6.240: icmp_seq=152 ttl=255 time=3.76 ms 64 bytes from 10.32.6.240: icmp_seq=153 ttl=255 time=4.03 ms 64 bytes from 10.32.6.240: icmp_seq=154 ttl=255 time=2.48 ms 64 bytes from 10.32.6.240: icmp_seq=201 ttl=255 time=18.0 ms 64 bytes from 10.32.6.240: icmp_seq=202 ttl=255 time=7.79 ms 64 bytes from 10.32.6.240: icmp_seq=203 ttl=255 time=0.914 ms 64 bytes from 10.32.6.240: icmp_seq=204 ttl=255 time=0.926 ms 64 bytes from 10.32.6.240: icmp_seq=205 ttl=255 time=17.7 ms 64 bytes from 10.32.6.240: icmp_seq=206 ttl=255 time=10.0 ms 64 bytes from 10.32.6.240: icmp_seq=207 ttl=255 time=0.864 ms 64 bytes from 10.32.6.240: icmp_seq=208 ttl=255 time=0.866 ms 64 bytes from 10.32.6.240: icmp_seq=209 ttl=255 time=9.32 ms 64 bytes from 10.32.6.240: icmp_seq=210 ttl=255 time=9.25 ms 64 bytes from 10.32.6.240: icmp_seq=211 ttl=255 time=23.7 ms 64 bytes from 10.32.6.240: icmp_seq=212 ttl=255 time=0.821 ms 64 bytes from 10.32.6.240: icmp_seq=260 ttl=255 time=0.997 ms 64 bytes from 10.32.6.240: icmp_seq=261 ttl=255 time=5.03 ms 64 bytes from 10.32.6.240: icmp_seq=262 ttl=255 time=0.853 ms 64 bytes from 10.32.6.240: icmp_seq=263 ttl=255 time=0.923 ms 64 bytes from 10.32.6.240: icmp_seq=264 ttl=255 time=2.26 ms 64 bytes from 10.32.6.240: icmp_seq=265 ttl=255 time=9.87 ms 64 bytes from 10.32.6.240: icmp_seq=266 ttl=255 time=17.3 ms 64 bytes from 10.32.6.240: icmp_seq=267 ttl=255 time=10.6 ms 64 bytes from 10.32.6.240: icmp_seq=268 ttl=255 time=16.7 ms 64 bytes from 10.32.6.240: icmp_seq=269 ttl=255 time=8.78 ms 64 bytes from 10.32.6.240: icmp_seq=270 ttl=255 time=2.07 ms 64 bytes from 10.32.6.240: icmp_seq=271 ttl=255 time=10.6 ms 64 bytes from 10.32.6.240: icmp_seq=272 ttl=255 time=4.55 ms (disabled ethernet interface or unplugged the cable here) 64 bytes from 10.32.6.240: icmp_seq=530 ttl=255 time=121 ms 64 bytes from 10.32.6.240: icmp_seq=531 ttl=255 time=2.36 ms 64 bytes from 10.32.6.240: icmp_seq=532 ttl=255 time=0.887 ms 64 bytes from 10.32.6.240: icmp_seq=533 ttl=255 time=0.853 ms 64 bytes from 10.32.6.240: icmp_seq=534 ttl=255 time=0.811 ms 64 bytes from 10.32.6.240: icmp_seq=535 ttl=255 time=0.871 ms 64 bytes from 10.32.6.240: icmp_seq=536 ttl=255 time=0.884 ms 64 bytes from 10.32.6.240: icmp_seq=537 ttl=255 time=0.898 ms 64 bytes from 10.32.6.240: icmp_seq=538 ttl=255 time=0.946 ms 64 bytes from 10.32.6.240: icmp_seq=539 ttl=255 time=0.908 ms 64 bytes from 10.32.6.240: icmp_seq=540 ttl=255 time=0.880 ms 64 bytes from 10.32.6.240: icmp_seq=541 ttl=255 time=0.850 ms (unplugged the cable here or disabled ethernet interface) 64 bytes from 10.32.6.240: icmp_seq=715 ttl=255 time=1.18 ms 64 bytes from 10.32.6.240: icmp_seq=716 ttl=255 time=1.87 ms 64 bytes from 10.32.6.240: icmp_seq=717 ttl=255 time=1.15 ms 64 bytes from 10.32.6.240: icmp_seq=718 ttl=255 time=19.3 ms 64 bytes from 10.32.6.240: icmp_seq=719 ttl=255 time=2.34 ms 64 bytes from 10.32.6.240: icmp_seq=742 ttl=255 time=0.885 ms 64 bytes from 10.32.6.240: icmp_seq=743 ttl=255 time=38.0 ms 64 bytes from 10.32.6.240: icmp_seq=744 ttl=255 time=5.30 ms 64 bytes from 10.32.6.240: icmp_seq=745 ttl=255 time=0.861 ms 64 bytes from 10.32.6.240: icmp_seq=746 ttl=255 time=1.49 ms 64 bytes from 10.32.6.240: icmp_seq=747 ttl=255 time=4.57 ms 64 bytes from 10.32.6.240: icmp_seq=748 ttl=255 time=14.4 ms 64 bytes from 10.32.6.240: icmp_seq=749 ttl=255 time=6.42 ms 64 bytes from 10.32.6.240: icmp_seq=772 ttl=255 time=1.45 ms 64 bytes from 10.32.6.240: icmp_seq=773 ttl=255 time=28.0 ms 64 bytes from 10.32.6.240: icmp_seq=774 ttl=255 time=0.887 ms 64 bytes from 10.32.6.240: icmp_seq=775 ttl=255 time=17.3 ms 64 bytes from 10.32.6.240: icmp_seq=776 ttl=255 time=0.871 ms 64 bytes from 10.32.6.240: icmp_seq=777 ttl=255 time=25.3 ms 64 bytes from 10.32.6.240: icmp_seq=778 ttl=255 time=8.00 ms 64 bytes from 10.32.6.240: icmp_seq=779 ttl=255 time=28.3 ms 64 bytes from 10.32.6.240: icmp_seq=802 ttl=255 time=0.901 ms 64 bytes from 10.32.6.240: icmp_seq=803 ttl=255 time=0.892 ms 64 bytes from 10.32.6.240: icmp_seq=804 ttl=255 time=1.17 ms 64 bytes from 10.32.6.240: icmp_seq=805 ttl=255 time=0.926 ms 64 bytes from 10.32.6.240: icmp_seq=806 ttl=255 time=0.783 ms 64 bytes from 10.32.6.240: icmp_seq=830 ttl=255 time=0.848 ms 64 bytes from 10.32.6.240: icmp_seq=831 ttl=255 time=4.76 ms 64 bytes from 10.32.6.240: icmp_seq=832 ttl=255 time=0.844 ms 64 bytes from 10.32.6.240: icmp_seq=833 ttl=255 time=1.21 ms 64 bytes from 10.32.6.240: icmp_seq=834 ttl=255 time=1.15 ms 64 bytes from 10.32.6.240: icmp_seq=835 ttl=255 time=0.910 ms 64 bytes from 10.32.6.240: icmp_seq=836 ttl=255 time=0.854 ms 64 bytes from 10.32.6.240: icmp_seq=837 ttl=255 time=0.896 ms 64 bytes from 10.32.6.240: icmp_seq=838 ttl=255 time=17.1 ms 64 bytes from 10.32.6.240: icmp_seq=839 ttl=255 time=1.06 ms 64 bytes from 10.32.6.240: icmp_seq=862 ttl=255 time=3.62 ms 64 bytes from 10.32.6.240: icmp_seq=863 ttl=255 time=0.870 ms 64 bytes from 10.32.6.240: icmp_seq=864 ttl=255 time=0.856 ms 64 bytes from 10.32.6.240: icmp_seq=865 ttl=255 time=0.901 ms 64 bytes from 10.32.6.240: icmp_seq=866 ttl=255 time=0.891 ms 64 bytes from 10.32.6.240: icmp_seq=867 ttl=255 time=1.04 ms 64 bytes from 10.32.6.240: icmp_seq=868 ttl=255 time=16.1 ms 64 bytes from 10.32.6.240: icmp_seq=869 ttl=255 time=2.74 ms 64 bytes from 10.32.6.240: icmp_seq=892 ttl=255 time=0.884 ms 64 bytes from 10.32.6.240: icmp_seq=893 ttl=255 time=0.989 ms 64 bytes from 10.32.6.240: icmp_seq=894 ttl=255 time=1.58 ms 64 bytes from 10.32.6.240: icmp_seq=895 ttl=255 time=0.947 ms 64 bytes from 10.32.6.240: icmp_seq=896 ttl=255 time=0.908 ms 64 bytes from 10.32.6.240: icmp_seq=897 ttl=255 time=0.884 ms 64 bytes from 10.32.6.240: icmp_seq=898 ttl=255 time=0.882 ms 64 bytes from 10.32.6.240: icmp_seq=899 ttl=255 time=0.857 ms 64 bytes from 10.32.6.240: icmp_seq=923 ttl=255 time=4.26 ms 64 bytes from 10.32.6.240: icmp_seq=924 ttl=255 time=7.96 ms 64 bytes from 10.32.6.240: icmp_seq=925 ttl=255 time=22.6 ms 64 bytes from 10.32.6.240: icmp_seq=926 ttl=255 time=0.885 ms 64 bytes from 10.32.6.240: icmp_seq=927 ttl=255 time=10.3 ms 64 bytes from 10.32.6.240: icmp_seq=928 ttl=255 time=0.939 ms 64 bytes from 10.32.6.240: icmp_seq=929 ttl=255 time=1.23 ms 64 bytes from 10.32.6.240: icmp_seq=952 ttl=255 time=0.924 ms 64 bytes from 10.32.6.240: icmp_seq=953 ttl=255 time=0.931 ms 64 bytes from 10.32.6.240: icmp_seq=954 ttl=255 time=0.887 ms 64 bytes from 10.32.6.240: icmp_seq=955 ttl=255 time=0.884 ms 64 bytes from 10.32.6.240: icmp_seq=956 ttl=255 time=0.923 ms 64 bytes from 10.32.6.240: icmp_seq=957 ttl=255 time=1.30 ms 64 bytes from 10.32.6.240: icmp_seq=958 ttl=255 time=2.02 ms 64 bytes from 10.32.6.240: icmp_seq=959 ttl=255 time=1.16 ms 64 bytes from 10.32.6.240: icmp_seq=1010 ttl=255 time=0.856 ms 64 bytes from 10.32.6.240: icmp_seq=1011 ttl=255 time=0.917 ms 64 bytes from 10.32.6.240: icmp_seq=1062 ttl=255 time=0.841 ms 64 bytes from 10.32.6.240: icmp_seq=1063 ttl=255 time=1.00 ms 64 bytes from 10.32.6.240: icmp_seq=1064 ttl=255 time=0.924 ms 64 bytes from 10.32.6.240: icmp_seq=1065 ttl=255 time=0.832 ms 64 bytes from 10.32.6.240: icmp_seq=1066 ttl=255 time=0.827 ms 64 bytes from 10.32.6.240: icmp_seq=1067 ttl=255 time=1.14 ms 64 bytes from 10.32.6.240: icmp_seq=1068 ttl=255 time=1.02 ms 64 bytes from 10.32.6.240: icmp_seq=1069 ttl=255 time=3.00 ms 64 bytes from 10.32.6.240: icmp_seq=1070 ttl=255 time=0.884 ms 64 bytes from 10.32.6.240: icmp_seq=1071 ttl=255 time=0.892 ms 64 bytes from 10.32.6.240: icmp_seq=1072 ttl=255 time=0.859 ms 64 bytes from 10.32.6.240: icmp_seq=1073 ttl=255 time=1.47 ms 64 bytes from 10.32.6.240: icmp_seq=1074 ttl=255 time=0.946 ms 64 bytes from 10.32.6.240: icmp_seq=1075 ttl=255 time=2.57 ms 64 bytes from 10.32.6.240: icmp_seq=1076 ttl=255 time=0.897 ms 64 bytes from 10.32.6.240: icmp_seq=1077 ttl=255 time=2.53 ms 64 bytes from 10.32.6.240: icmp_seq=1128 ttl=255 time=0.914 ms 64 bytes from 10.32.6.240: icmp_seq=1129 ttl=255 time=0.790 ms 64 bytes from 10.32.6.240: icmp_seq=1130 ttl=255 time=0.895 ms 64 bytes from 10.32.6.240: icmp_seq=1131 ttl=255 time=1.14 ms 64 bytes from 10.32.6.240: icmp_seq=1132 ttl=255 time=0.916 ms 64 bytes from 10.32.6.240: icmp_seq=1133 ttl=255 time=1.32 ms 64 bytes from 10.32.6.240: icmp_seq=1134 ttl=255 time=0.883 ms 64 bytes from 10.32.6.240: icmp_seq=1135 ttl=255 time=0.886 ms 64 bytes from 10.32.6.240: icmp_seq=1136 ttl=255 time=0.804 ms 64 bytes from 10.32.6.240: icmp_seq=1137 ttl=255 time=0.862 ms 64 bytes from 10.32.6.240: icmp_seq=1138 ttl=255 time=0.835 ms 64 bytes from 10.32.6.240: icmp_seq=1139 ttl=255 time=8.12 ms I made some newlines to show that there is no exact frequence. The acpi messages from above only show up when I plug the cable, so I am no longer certain that this issue is ACPI related. I can see avahi messages in syslog and in auth.log: from syslog: Nov 16 10:15:59 meik-Latitude-E7440 avahi-daemon[757]: Invalid response packet f rom host 10.32.192.42. Nov 16 10:15:59 meik-Latitude-E7440 avahi-daemon[757]: Invalid response packet f rom host 10.32.192.117. Nov 16 10:15:59 meik-Latitude-E7440 avahi-daemon[757]: Invalid response packet f rom host 10.32.192.45. (this is probably related to Bug #1342400 "avahi-daemon constantly reporting "Invalid response packet from host" and can probably be ignored) from auth.log: Nov 16 10:20:25 meik-Latitude-E7440 dbus[727]: [system] Rejected send message, 10 matched rules; type="method_return", sender=":1.37" (uid=0 pid=1195 comm="/usr/sbin/dnsmasq --no-resolv --keep-in-foreground") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.7" (uid=0 pid=790 comm="/usr/sbin/NetworkManager --no-daemon ") Not sure anymore that my ethernet issue is ACPI related. The ACPI messages are there, but maybe they are not related. My new suspect is avahi/networkmanager/dnsmasq. I do some further investigations. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1516407 Title: Ethernet interface stops working after a few seconds Status in linux package in Ubuntu: Incomplete Bug description: After plugging a ethernet cable into the laptop (Dell Latitude E7440), Network Manager picks up as expected, requests a IP address and configures the interface. After a couple of seconds, the interface stops working. The interface start to response to packets only after unplugging the cable and plugging it in again; disabling and enabling the interface does not help. With dmesg I can see some ACPI errors everytime I plug a cable: [ 76.322029] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None [ 81.345308] ACPI Error: Index value 0x0000000000000083 overflows field width 0x7 (20150619/exfldio-341) [ 81.345329] ACPI Error: Method parse/execution failed [\NEVT] (Node ffff88040e0c7258), AE_AML_REGISTER_LIMIT (20150619/psparse-536) [ 81.345344] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.ECDV._Q66] (Node ffff88040e0c4b90), AE_AML_REGISTER_LIMIT (20150619/psparse-536) The 15 second gap between "Link is Up" and the ACPI error matches nicely the max. 15 ping echoes received. I found bug 1501993 " drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]() ", which has a completely different effect, but states exactly the same ACPI errors in comment #35. Tried BIOS A16, A10 and A04, also kernels 4.2.0-18-generic (current), 4.2.0-16-generic and the vanilla 4.3.0-040300-generic, but without any effect or changed behaviour. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-18-generic 4.2.0-18.22 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: meik 1538 F.... pulseaudio /dev/snd/controlC1: meik 1538 F.... pulseaudio CurrentDesktop: MATE Date: Sun Nov 15 19:56:08 2015 HibernationDevice: RESUME=UUID=3fec7530-b539-4773-ac1e-c1357f0b9e52 InstallationDate: Installed on 2015-04-22 (207 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) MachineType: Dell Inc. Latitude E7440 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-18-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-18-generic N/A linux-backports-modules-4.2.0-18-generic N/A linux-firmware 1.149.2 SourcePackage: linux UpgradeStatus: Upgraded to wily on 2015-10-23 (23 days ago) dmi.bios.date: 09/01/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A16 dmi.board.name: 0PPXP5 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA16:bd09/01/2015:svnDellInc.:pnLatitudeE7440:pvr00:rvnDellInc.:rn0PPXP5:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7440 dmi.product.version: 00 dmi.sys.vendor: Dell Inc. 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