Re: Packet loss with QCA9377 (ath10k) on ASUS VivoBook E410KA

[Bjorn Helgaas <helgaas@kernel.org>]

[+cc Jeff, ath10k maintainer, Mani]

On Fri, Aug 01, 2025 at 12:09:01AM +0530, Bandhan Pramanik wrote:
> Hello,
> 
> I'm helping someone who was having trouble with their Wi-Fi on Asus VivoBook
> E410KA. The device uses the QCA9377 Wireless Chip.
> 
> The device suffered from a single packet loss within 33 seconds while
> running a continuous ping. There might be some PCIe-level communication
> problems too.
> 
> All the relevant logs can be found here in a redacted form:
> 
> First part (ping, hostnamectl, ip addr, lspci): https://gist.github.com/BandhanPramanik/7eefd192c3a728d2473687a786fbbc01/raw/e77f0fa1cf35c748730df220b0057399ac78f539/miscellaneous
> 
> Second part (cat /proc/interrupts, modinfo ath10k_pci): https://gist.github.com/BandhanPramanik/7eefd192c3a728d2473687a786fbbc01/raw/e77f0fa1cf35c748730df220b0057399ac78f539/miscellaneous%25202
> 
> dmesg: https://gist.github.com/BandhanPramanik/7eefd192c3a728d2473687a786fbbc01/raw/e77f0fa1cf35c748730df220b0057399ac78f539/dmesg
> 
> We’re not sure if this is a driver issue, a firmware problem, or maybe
> something hardware-specific.
> 
> Has anyone seen something similar with this chip? Any tips on how to
> troubleshoot or fix the packet loss?

ath10k mucks directly with ASPM, which it definitely shouldn't do
because ASPM configuration is extremely sensitive, it involves both
ends of the link, and the PCI core needs to know about it.  So I'm a
little suspicious of some issue there.

Mani recently posted a patch series to clean that up a bit, but it's
not fully cooked yet, and I don't know whether it will help this
situation:
https://lore.kernel.org/r/20250716-ath-aspm-fix-v1-0-dd3e62c1b692@oss.qualcomm.com

Bjorn