Re: [BUG] wifi: rtw88: Hard system freeze on RTL8821CE when power_save is enabled (LPS/ASPM conflict)

[LB F]

Hi Bitterblue,

A follow-up after a full day of intensive stress testing with your RX
descriptor validation patch.

I ran seven automated test phases back-to-back, clearing dmesg before each run:

Power save rapid toggle (0.1s intervals) during heavy download.
Ping flood (10,000 packets) with simultaneous power save toggle.
RF kill flapping (15 rfkill block/unblock cycles).
MTU jitter (switching between 500 and 1500 bytes) under load.
NetworkManager disconnect/reconnect (8 cycles).
S3 suspend/resume (3 cycles via rtcwake, 10s each) under load.
Combined chaos: all of the above simultaneously with random MTU.
Additionally, I manually triggered S4 hibernation while running a
continuous power save toggle loop with a heavy download. The laptop
hibernated, powered off completely, and resumed without errors. I also
did a full reboot and verified the logs from a clean boot.

Result: zero anomalies across all phases. No "drv_info_sz" messages,
no mac80211 warnings, no oops or panics. The single occurrence of the
bug I reported earlier (at 02:59, before I began testing) remains the
only event for the entire day — and it was cleanly handled by the
validation without any impact on stability.

I will continue monitoring over the next few days to confirm long-term
reliability.

Best regards, Oleksandr Havrylov