Public bug reported:
We have dell latitude 5420 & 5520 laptops with onboard intel ethernet
controller.
Problem is that the ethernet port is extremely slow. about 100kbyte/s download
throughput while on a gigabit connection. Upload seems to work just fine.
Also when I pxe boot the system it's also painfully slow.
But here comes the funny part. When I attach a usb memory stick the
throughput of the networkcontroller is as expected.
I've used latest ubuntu 20.04.2 kernel 5.6.0-1032-oem (Certified by ubuntu and
dell)
I've used latest ubuntu 20.04.2 kernel 5.10.0-1029-oem
I've used latest ubuntu 20.04.2 kernel 5.8.0-55
Turns out this problem is not showing up when I manually install the 5.8.18
kernel.
Also when I create my own iso with the help of Cubic and install the
5.8.18 kernel in it the pxe boot is working as expected with high
throughput
system: Dell latitude 5420 + 5520
nic: Ethernet Connection (13) I219-LM
ubuntu 20.04.2
module: e1000e
Please assist. Thank you
** Affects: linux-oem-5.6 (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "apport.linux-image-5.10.0-1029-oem.d72pbt2u.apport"
https://bugs.launchpad.net/bugs/1931977/+attachment/5504721/+files/apport.linux-image-5.10.0-1029-oem.d72pbt2u.apport
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https://bugs.launchpad.net/bugs/1931977
Title:
e1000e extremly slow
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