Re: rtw88: Guaranteed system freeze with RTL8821CE with RFE 2 type

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On Wednesday, May 26, 2021 10:03 PM, Larry Finger [off-list ref] wrote:

On 5/23/21 1:36 PM, rtl8821cerfe2 wrote:

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On Thursday, May 20, 2021 8:51 AM, Larry Finger Larry.Finger@lwfinger.net wrote:

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On 5/19/21 4:00 PM, rtl8821cerfe2 wrote:

quoted

On Monday, May 10, 2021 4:49 PM, rtl8821cerfe2 rtl8821cerfe2@protonmail.com wrote:

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On Monday, May 10, 2021 3:06 PM, rtl8821cerfe2 rtl8821cerfe2@protonmail.com wrote:
disable_lps_deep=1 did not help.
The patch set called "rtw88: add scan notify to firmware and refine fw_feature check" may have fixed this problem. I've been running commit 6ccdad5a58e18eac6b1335f05f94bf2b36146e00 from lwfinger/rtw88 for 3 days now with no freeze. It was impossible to go more than a few hours without a freeze before these patches.

Sounds good. I will keep porting the patches submitted to wreless-drivers-next
to the rtw88 repo at GitHub. I have no idea why this would preclude a system
freeze, but the Realtek guys might.
Larry

I spoke too soon. It does still freeze even with that patch set.

Can you provide any more information about the freezes? As I recall, you did say
that nothing was logged, but are the CPU fans working hard indicating the the
CPU is active? On the desktop, does the mouse pointer move?

Larry

Sorry, I forgot to check my email.

Nothing was logged, the CPU fan was spinning at a normal speed which is barely audible, and the mouse pointer didn't move anymore.

Also, I tried the rtw_core option debug_mask=65535, which activates all the debug messages available, hoping to capture some useful information during the freeze, but with that option the freeze didn't happen. This suggests to me a timing problem, but who knows. I'm mostly clueless about kernel programming.