Arch Linux

DevPre

Member

Registered: 2018-01-23

Posts: 8

[SOLVED] After sleep network connection (LAN) is slow.

Hi, after suspension/sleep my on-board NIC becomes very slow. From an average of 70-80mbps in download and 20mbps in upload slows down to 4-6mbps in download and 1mbps in upload.
<edit mod="Xyne">Replaced oversized images with links.</edit>
image 1
image 2
Connecting my laptop to the same LAN cable shows that the cable is not faulty and it isn't a router problem.

Specs:
Motherboard: ASRock Z87 Extreme3
CPU: Intel i5 4690k @ 4.4 Ghz
GPU: Intel HD 4400 / Nvidia GTX680 (vfio/ pcie passthrough)

NIC:

lspci -knn
...
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-V [8086:153b] (rev 05)
        Subsystem: ASRock Incorporation Ethernet Connection I217-V [1849:153b]
        Kernel driver in use: e1000e
        Kernel modules: e1000e

I'm also using network manager. Thanks for the support!

Last edited by DevPre (2018-03-10 18:10:06)

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,332

Website

Re: [SOLVED] After sleep network connection (LAN) is slow.

Please edit your post to remove the oversized images.  In addition to being extremely large, they really don't add any relevant information.

Journal logs and perhaps dmesg from right after a wake from suspend might be useful.

Last edited by Trilby (2018-03-10 17:25:04)

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

seth

Member

Registered: 2012-09-03

Posts: 61,236

Re: [SOLVED] After sleep network connection (LAN) is slow.

Also get NM out of the equation (use eg. dhcpcd) and try to reload the e1000e module after the wake-up.

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

DevPre

Member

Registered: 2018-01-23

Posts: 8

Re: [SOLVED] After sleep network connection (LAN) is slow.

The issue seems to be caused by an unsupported speed/duplex configuration. Changing the duplex to Full and the speed to 1000mbps solved the problem (for now). I apologise for the large images, i thought that the forum CMS would automatically resize them.

seth

Member

Registered: 2012-09-03

Posts: 61,236

Re: [SOLVED] After sleep network connection (LAN) is slow.

Is autonegitiation enabled?

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

DevPre

Member

Registered: 2018-01-23

Posts: 8

Re: [SOLVED] After sleep network connection (LAN) is slow.

Is autonegitiation enabled?

Settings for enp0s25:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  1000baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on (auto)
Cannot get wake-on-lan settings: Operation not permitted
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

Yes it is. For some reason the link mode was set to duplex half and speed 98mbps. This might have been caused by the fact that KDE has the quirk of changing the selected option if scrolling with the mouse wheel while hoovering on a selection.

Last edited by DevPre (2018-03-10 18:20:18)