Score:0

Ubuntu 20.04 slow download speed (wired network)

in flag

I have a 1Gbps connection and for some reason the download speed is very slow on Ubuntu 20.04 (using a wired connection not wifi). I tested several times using speedtest.net and got very different results on 2 different distros.

Ubuntu 20.04 speedtest results

Download speed  |  Upload speed
72 Mbps            450 Mbps

I tested using Pop!_OS distro live CD and the results were totally different

Download speed  |  Upload speed
996 Mbps           444 Mbps

What could be the problem?

guiverc avatar
cn flag
Pop OS is off-topic here, but they use *testing* (-proposed) packages & kernel) in their system, which isn't used by default in the *stable* oriented Ubuntu system. You didn't state any specifics as to software stack for Pop OS (were vague with 20.04, was it GA or HWE stack?) but that's where I'd be looking instead of *distro*.
FedKad avatar
cn flag
Does this help? https://askubuntu.com/questions/1344532/wired-network-extremely-slow
in flag
@FedonKadifeli Thanks, that fixed the problem
karel avatar
sa flag
Does this answer your question? [Wired network extremely slow](https://askubuntu.com/questions/1344532/wired-network-extremely-slow)
Score:1
in flag

Thanks to @FedonKadifeli I was able to fix the problem, this seems to be a known bug. The solution was to pass a kernel parameter to grub.

https://bugs.launchpad.net/ubuntu/+source/linux-oem-5.10/+bug/1930754

The trick is to set the boot kernel parameter "pcie_aspm=off" in '/etc/default/grub'

Like this:

GRUB_CMDLINE_LINUX_DEFAULT="splash pcie_aspm=off"

After that run;

update-grub

pcie_aspm is some sort of power management thingie which probably puts my networkcontroller to sleep or something.
ThN avatar
fr flag
ThN
This is exactly my issue, Martin. I applied this answer and still no changes at all. My internet connection is still way lower than expected just like for OP.
mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.