Arch Linux

codedcosmos

Member

Registered: 2017-09-25

Posts: 18

Re: wlan0 disappeared with Wi-Fi WCN785x card (ath12k_pci)

I updated to the newest kernel and firmware from testing:

6.14.7-arch2-1

Seems to fix it for me, not sure if it was the firmware or the kernel. But I am happy.

Pabley

Member

Registered: 2025-05-11

Posts: 5

Re: wlan0 disappeared with Wi-Fi WCN785x card (ath12k_pci)

The reverted linux-firmware 20250508.788aadc8-2 works fine for me with linux 6.14.6.arch1-1.

Arisa

Member

From: Valhalla

Registered: 2019-11-12

Posts: 11

Re: wlan0 disappeared with Wi-Fi WCN785x card (ath12k_pci)

Dunno if related but mine still doesn't work

kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE, tid 10 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE, tid 10 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 10 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE, tid 11 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE, tid 11 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 11 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 12 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 13 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 14 (-105)
kernel: ath12k_pci 0000:09:00.0: failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid 15 (-105)
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e1c800 flags=0x0020]
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e5c800 flags=0x0020]
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e19000 flags=0x0020]
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e22800 flags=0x0020]
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e17000 flags=0x0020]
kernel: ath12k_pci 0000:09:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0015 address=0xf9e12000 flags=0x0020]

get a lot of errors about it able to access some memory and such, it is not able to receive any data, even enough to establish DHCP for IP or such

EDIT:
it actually seems to be same issue as this: https://bbs.archlinux.org/viewtopic.php?id=301045

Last edited by Arisa (Yesterday 11:49:30)

void4m0n

Member

Registered: Yesterday

Posts: 1

Re: wlan0 disappeared with Wi-Fi WCN785x card (ath12k_pci)

It seems that the latest linux-firmware fixes the problem, my card is now detected and seems to work perfectly.

pacman -Q linux-firmware
linux-firmware 20250508.788aadc8-2

https://gitlab.com/kernel-firmware/linu … 3ba3c96031

loqs

Member

Registered: 2014-03-06

Posts: 18,439

Re: wlan0 disappeared with Wi-Fi WCN785x card (ath12k_pci)

It seems that the latest linux-firmware fixes the problem, my card is now detected and seems to work perfectly.

pacman -Q linux-firmware
linux-firmware 20250508.788aadc8-2

https://gitlab.com/kernel-firmware/linu … 3ba3c96031

Just to note linux-firmware [20250508.788aadc8-2] reverted 360fd45 ath12k: WCN7850 hw2.0: update to WLAN.HMT.1.1.c5-00284-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 the upstream fix 2e91d8c ath12k: WCN7850 hw2.0: update to WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 will be included in the next upstream release of linux-firmware.