RE: rtw89_8852be (RTL8852BE): PCIe device not ready after s2idle resume, probe fails with -110

[Ping-Ke Shih <pkshih@realtek.com>]

// in plain text format please.

Dev Narayan <devnarayan08807@gmail.com> wrote:
> Hello,
> 
> I am reporting a Wi-Fi failure after suspend/resume with the rtw89_8852be 
> driver. After resume the card never responds, and only a full reboot brings 
> Wi-Fi back.
> 
> HARDWARE AND SOFTWARE
> - Laptop: ASUS TUF Gaming F16 FX607VJB (Intel Core 5 210H)
> - BIOS: American Megatrends FX607VJB.338, 2025-08-27 <FILL IN: "latest 
> available from ASUS as of DATE" or "updated to VERSION and retested"
>
> - Wi-Fi: Realtek RTL8852BE PCIe 802.11ax [10ec:b852], subsystem AzureWave 
> [1a3b:5471], at 0000:04:00.0
> - Bluetooth: USB, IMC Networks [13d3:3571] (btusb, Realtek firmware 
> rtl8852bu)
> - Distro: Kali Linux (rolling)
> - Kernel: 7.1.5+kali-amd64
> - Firmware: rtw89/rtw8852b_fw-2.bin

It'd better to point out the firmware version you are using.

> - Sleep mode: s2idle (cat /sys/power/mem_sleep shows "[s2idle] deep")
> 
> STEPS TO REPRODUCE
> 1. Boot with default settings. Wi-Fi works.
> 2. Run: systemctl suspend
> 3. Wait about 10 seconds and wake the laptop.
> 
> EXPECTED RESULT
> Wi-Fi resumes and reconnects.
> 
> ACTUAL RESULT
> The Wi-Fi device is gone from NetworkManager (nmcli device lists only lo 
> and eth0). lspci still shows the card at 04:00.0, but with no "Kernel 
> driver in use". Bluetooth recovers fine after resume; only the Wi-Fi card 
> is affected.
> 
> KEY KERNEL LOG LINES
> rtw89_8852be 0000:04:00.0: not ready 1023ms after resume; waiting
> ...
> rtw89_8852be 0000:04:00.0: not ready 65535ms after resume; giving up
> rtw89_8852be 0000:04:00.0: failed to write DBI register, addr=0xB48
> rtw89_8852be 0000:04:00.0: failed to read PCI cap, ret=134
> rtw89_8852be 0000:04:00.0: xtal si not ready(W): offset=90 val=10 mask=10
> rtw89_8852be 0000:04:00.0: mac preinit fail, ret: -110
> 
> Manually reloading the module afterwards also fails every time:
> rtw89_8852be 0000:04:00.0: loaded firmware rtw89/rtw8852b_fw-2.bin
> rtw89_8852be 0000:04:00.0: xtal si not ready(R): offset=41
> rtw89_8852be 0000:04:00.0: failed to power on
> rtw89_8852be 0000:04:00.0: failed to setup chip information
> rtw89_8852be 0000:04:00.0: probe with driver rtw89_8852be failed with error 
> -110
> 
> WORKAROUNDS TRIED (none restored Wi-Fi after resume)
> - rtw89_pci disable_aspm_l1=y disable_aspm_l1ss=y disable_clkreq=y

These workarounds take effect after you cold reboot. Please confirm this.

> - rtw89_core disable_ps_mode=y
> - NetworkManager wifi.powersave = 2
> - btusb.enable_autosuspend=n (Bluetooth only)
> - modprobe -r / modprobe of rtw89_8852be
> - PCI remove and rescan of 0000:04:00.0 (echo 1 > /sys/bus/pci/devices/
> 0000:04:00.0/remove, then echo 1 > /sys/bus/pci/rescan)
> 
> OTHER NOTES
> - The same symptom occurred on NixOS on this laptop before I moved to Kali, 
> so it does not appear to be distro-specific.
> - mem_sleep_default=deep result: <FILL IN: fixed it / did not fix it / 
> laptop failed to wake / not tested
>
> - pcie_aspm=off result: <FILL IN or delete this line
>
> 
> LOGS
> Full logs are linked below (plain text):
> - dmesg on default settings after the failure: <LINK>
> - dmesg with the workarounds above applied: <LINK>
> - lspci -nnvv -s 04:00.0: <LINK>
> - Kernel, cmdline, DMI and BIOS info: <LINK>
> 
> I can test patches or provide more debug output (for example with rtw89 
> debug_mask set, or additional kernel parameters) if that helps.

Please try patch [1], but unconditionally do pci_d3cold_disable() no matter
dmi match or not. 

[1] https://lore.kernel.org/all/20260911065358.34375-1-pkshih@realtek.com/