Dreadful network performance --- how to start?

[joneall]

My wife's computer runs W10 and I'm on the latest Neon. Both are connected by gigabit ethernet to a "modem" which is connected to our internet provider by a fiber network. My wife's computer gets much better network rates. I switched computers (only) just to make sure it's not the cabling and it isn't. She gets over 900 Mbs down and 700 up. I get 400 down and 350 up.

It's very embarrassing.

I have no idea where to start looking for network problems and would welcome any suggestions.

[claydoh]

Wifi? Wired?

Which card?
Maybe it needs a config edit.

There are various ways to get the card info.
https://www.cyberciti.biz/faq/linux-...cards-command/

[joneall]

Sorry I forgot to mention the n/w card. And thanks for the link -- very useful.

I'm connected by wired gigabit ethernet to a "modem" and from there by fiber to the ISP.

$ sudo lshw -class network
*-network
description: Ethernet interface
product: RTL8111/8168/8211/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 0c
serial: 40:8d:5c:77:34:78
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=6.14.0-37-generic duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.1.60 l
atency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:18 ioport:d000(size=256) memory:f7900000-f7900fff memory:f2100000-f2103fff

cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 183044 1504 0 0 0 0 0 0 183044 1504 0 0 0 0 0 0
enp3s0: 28247818 26722 0 11 0 0 0 228 2678633 12771 0 0 0 0 0 0

I googled the driver and managed to extract this info:

$ grep -i driver net-card.out
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=6.14.0-37-generic duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.1.60 l
atency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
jon@jon-desktop:~$ sudo su
root@jon-desktop:/home/jon# for i in $(ls /sys/class/net); do
echo $i '====================='
ethtool -i $i
done
enp3s0 =====================
driver: r8169
version: 6.14.0-37-generic
firmware-version: rtl8168g-2_0.0.1 02/06/13
expansion-rom-version:
bus-info: 0000:03:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
lo =====================
Cannot get driver information: Operation not supported

This is not the latest driver, according to this. But it worked find up til a few weeks or months ago. Could a system update have caused an incompatibility? Not being an expert, I hesitate to start playing with drivers.