Atheros QCA9377 slow speed

seth · 2025-10-02 19:03:41

We've gone full cycle on that one
https://bbs.archlinux.org/viewtopic.php … 9#p2263149
Fuck.

Did the

Sep 27 18:41:56 laptop-ca kernel: pcieport 0000:00:1d.0: AER: Multiple Correctable error message received from 0000:01:00.0
Sep 27 18:41:56 laptop-ca kernel: r8169 0000:01:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Receiver ID)
Sep 27 18:41:56 laptop-ca kernel: r8169 0000:01:00.0: device [10ec:8136] error status/mask=00000001/00006000

noise go away w/ pcie_aspm=off ?
Can you disable the ethernet chip (in the firmware settigns) or does it help to blacklist r8169 ?

gtarch · 2025-10-05 18:22:31

seth wrote:

Did the noise go away w/ pcie_aspm=off ?

Yes, it did.

seth wrote:

Can you disable the ethernet chip (in the firmware settigns) or does it help to blacklist r8169 ?

I disabled it in the firmware. The boot log is here: https://0x0.st/KMnG.txt

The speed remains unchanged.

Last edited by gtarch (2025-10-05 18:30:47)

seth · 2025-10-07 21:38:59

There're currently no indications for any problem, you've a 80MHz VHT connection and an ok signal.

There's https://bbs.archlinux.org/viewtopic.php?id=309117 but that's asymmetric (doesn't affect WAN traffic) - any chance you put on a traffic quota via a firewall rule?
Also wrt rx bitrates being constantly > 200 (and typically > 400) Mbps, can you rule out any sideload traffic? Can you test the performance from a multi-user.target login and/or just monitor network traffic when you think there's nothing going on?

gtarch · Yesterday 15:18:41

seth wrote:

any chance you put on a traffic quota via a firewall rule?

No firewall. Neither nftables nor iptables.

seth wrote:

Also wrt rx bitrates being constantly > 200 (and typically > 400) Mbps, can you rule out any sideload traffic?

jnettop is showing no traffic on idle and about 20Mbit/s when running iperf test.

seth wrote:

Can you test the performance from a multi-user.target login and/or just monitor network traffic when you think there's nothing going on?

Do you mean a tty login? Without a GUI session?

Edit: I ran systmectl isolate multi-user.target and tested from tty login. No traffic on idle, 20ish mbit/s with iperf.

Last edited by gtarch (Yesterday 15:33:43)

seth · Today 08:31:13

Do you mean a tty login? Without a GUI session?

systmectl isolate multi-user.target

I didn't pay attention or missed the edit, but

Edit: I didn't think about this earlier, but I tried Windows as well. It turns out that both iperf and online speed tests get better speeds there. 150Mbit/s for iperf and 50Mbit/s (the line speed).

3rd link below. Mandatory.
Disable it (it's NOT the BIOS setting!) and reboot windows and linux twice for voodo reasons.

Can you btw. get closer to the AP ("4 bars") and see whether the issue remains?
How much is your theoretical WAN speed, would a download against a fast WAN host expose the limited throughput?

wget -nv --show-progress -O /dev/null "http://speedtest.frankfurt.linode.com/100MB-frankfurt.bin" |& tee /tmp/wft.log

will write a log.
You can use either of ("newark" "singapore" "london" "frankfurt" "dallas" "toronto1" "syd1" "atlanta" "tokyo2" "mumbai1" "fremont" "sao-paulo") - so pick a location near you.

gtarch · Today 14:58:31

I disabled fast-start, followed the voodo procedure and booted into multi-user.target.
My WAN speed is 50Mbit/s and I get that from other PCs, but not from this laptop.
Here is the speedtest from the Frankfurt server, which is the closest to me: http://0x0.st/KuEh.txt
This is close to the AP with 4 bars.

For comparison here's the same speedtest from a LAN PC: http://0x0.st/KuEC.txt

Last edited by gtarch (Today 14:58:58)

Arch Linux

#26 2025-10-02 19:03:41

Re: Atheros QCA9377 slow speed

#27 2025-10-05 18:22:31

Re: Atheros QCA9377 slow speed

#28 2025-10-07 21:38:59

Re: Atheros QCA9377 slow speed

#29 Yesterday 15:18:41

Re: Atheros QCA9377 slow speed

#30 Today 08:31:13

Re: Atheros QCA9377 slow speed

#31 Today 14:58:31

Re: Atheros QCA9377 slow speed

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