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Sender: Larry Finger <larry.finger@gmail.com>
Subject: Re: rtw88: Guaranteed system freeze with RTL8821CE with RFE 2 type
To:     rtl8821cerfe2 <rtl8821cerfe2@protonmail.com>,
        "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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From:   Larry Finger <Larry.Finger@lwfinger.net>
Message-ID: <d65a162e-9d0c-fff9-65e3-4553a1981ad3@lwfinger.net>
Date:   Thu, 20 May 2021 00:51:57 -0500
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On 5/19/21 4:00 PM, rtl8821cerfe2 wrote:
> On Monday, May 10, 2021 4:49 PM, rtl8821cerfe2 <rtl8821cerfe2@protonmail.com> wrote:
> 
> &gt; On Monday, May 10, 2021 3:06 PM, rtl8821cerfe2 rtl8821cerfe2@protonmail.com wrote:
> &gt;
> &gt; &gt; On Monday, May 10, 2021 4:16 AM, Larry Finger Larry.Finger@lwfinger.net wrote:
> &gt; &gt;
> &gt; &gt; &gt; The only splat that shows in either attachment is due to you not installing the
> &gt; &gt; &gt; regulatory database that sets the channels etc. for your domain. I do not know
> &gt; &gt; &gt; what it is called for your distro - it is wireless-regdb on mine. It is unlikely
> &gt; &gt; &gt; that this is the cause of your problem, but who knows?
> &gt; &gt; &gt; Larry
> &gt; &gt;
> &gt; &gt; I installed the wireless-regdb package. The error message about
> &gt; &gt; regulatory.db went away, but the system still froze.
> &gt; &gt; I'll try the rtw_core parameter disable_lps_deep=1 now.
> &gt;
> &gt; 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