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Wed, 08 Apr 2026 07:26:41 -0700 (PDT) Message-ID: <5f9003ca-3bfc-45aa-bf0e-35e9c991629d@gmail.com> Date: Wed, 8 Apr 2026 17:26:38 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [BUG] wifi: rtw88: Hard system freeze on RTL8821CE when power_save is enabled (LPS/ASPM conflict) To: Ping-Ke Shih , LB F Cc: "linux-wireless@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <5eb90d6d-e590-4c9e-91c8-1ba315f45304@gmail.com> <6898154c58c84536a0dd4351b3b026fb@realtek.com> <5fb2f699626b483b8a0a537960b274f0@realtek.com> Content-Language: en-US From: Bitterblue Smith In-Reply-To: <5fb2f699626b483b8a0a537960b274f0@realtek.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 31/03/2026 03:32, Ping-Ke Shih wrote: > > LB F wrote: >> >> Could you advise on how to investigate this further? For example: >> >> - Is there a debug flag or register dump we could capture right >> before the first corrupted frame in a burst? >> - Would it help to log C2H (chip-to-host) traffic around the >> time of these events? > > I have never heard about this symptom from internal, so no clear > idea for that. Sorry. > >> >> I am ready to run any specific tests you need. In the meantime, >> I agree that filtering by DRV_INFO_SIZE is the right practical >> solution, and I'm waiting for your official patch to test locally. > > As malformed frames happen randomly, more validations like > DRV_INFO_SIZE are needed. I think Bitterblue is working on the > test patch. :) > > Ping-Ke > Yes, I am preparing a patch now.