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Fri, 25 Sep 2026 22:35:08 -0700 (PDT) Date: Sat, 26 Sep 2026 11:05:05 +0530 From: Krishna Chomal To: BurningHoryd Cc: linux-usb@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: Re: [BUG] HP OMEN Transcend 14 (board 8E41): GPU power ceiling on 65W USB-C charger is non-deterministic Message-ID: References: <20260922192312.40607-1-sjunhyuk1@gmail.com> <20260922213218.5334-1-sjunhyuk1@gmail.com> <20260925134148.435774-1-sjunhyuk1@gmail.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline In-Reply-To: <20260925134148.435774-1-sjunhyuk1@gmail.com> On Fri, Sep 25, 2026 at 09:41:48AM -0400, BurningHoryd wrote: >Krishna, > >Thanks for taking a look. The acpidump is already up -- BIOS is still >F.05 (same as when I captured it on 8E41), so a fresh dump would be >byte-identical to what I already have; no need to redo it. > >Full acpidump + decompiled SSDT23 (the table with the NPCF device) is >attached to my earlier comment on the NVIDIA issue: > > https://github.com/NVIDIA/open-gpu-kernel-modules/issues/1162#issuecomment-5779711336 > >Same topology as board 8D40 from that issue: NPCF sits under \_SB as a >peer of the GPU rather than as its PCIe child, which is why the open >kernel module's NPCF binding misses it and Power Management Object >stays N/A. That explains why >50W Dynamic Boost never works here, but >it's a separate mechanism from the 25W/65W split on the 65W charger -- >PMO is N/A in both states, so it can't be what's flipping that. > >Happy to attach the raw acpidump/ssdt23-acpi.zip directly to this >thread instead of linking out, if that's easier for you to work with >-- just say the word. Thanks but I can only find SSDT23, I wanted to take a look at the HP WMI side too. Is it possible for you to attach the full acpidump instead? >Thanks for flagging the missing Signed-off-by on the other 8E41 patch >too.