RE: [PATCH] wifi: rtw88: add quirk to disable deep LPS for ASUS VivoBook X515JA

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

Gabriel Vinícius da Maia <mailto:gabriel_v_maia@estudante.sesisenai.org.br> wrote:
> I was unable to test the patch in runtime. Building the module against
> my running kernel (6.19) failed due to version mismatch with the tree
> (7.1-rc2), specifically the kmalloc_obj() symbol introduced in the
> newer version.

Did you mean the patch on 6.19 works fine to you?

> 
> I then compiled the full kernel from the tree, but the resulting
> build lacked several modules required by Fedora 43 to boot properly,
> causing the system to hang during initialization.
> 
> However, the patch follows the same logic as commit b2bf9d61e14a,
> which disables deep LPS for an HP laptop with the same RTL8821CE
> chip and identical error messages. The dmesg output from my system
> shows the same pattern:
> 
>   rtw88_8821ce 0000:01:00.0: firmware failed to leave lps state
>   rtw88_8821ce 0000:01:00.0: failed to send h2c command

Maybe you can try to turn off entirely power save by
  iw wlan0 set power save off

But I wonder if these messages can affect your daily use?

> 
> I also investigated whether enabling FW_FEATURE_LPS_C2H would be a
> more general fix, but inspection of rtw8821c_fw.bin (version 24.11.0)
> shows the bit is not set and FW_FEATURE_SIG is also absent, causing
> the driver to discard the feature report entirely.

If FW_FEATURE_LPS_C2H is not set, it goes into 
__rtw_fw_leave_lps_check_reg(). Maybe you can try to enlarge the timeout
time or retry count.