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Tue, 10 Nov 2026 18:53:00 +0000 (UTC) Date: Tue, 10 Nov 2026 10:52:57 -0800 From: Borislav Petkov To: Dario Ackermann Cc: Thorsten Leemhuis , linux-kernel@vger.kernel.org, regressions@lists.linux.dev, x86@kernel.org, tglx@kernel.org Subject: Re: AW: [REGRESSION] x86/microcode: boot hangs bringing up first secondary CPU on i7-6700HQ, avoided by dis_ucode_ldr Message-ID: <20261110185257.GFavNoCWszSXhRkaOV@fat_crate.local> References: <630330232567670562275469.6204.202611921938@darioackermann.ch> <8a0a9e63-54c2-4e5d-9479-1e39946328c4@leemhuis.info> <691747894523180440145931.1352.2026111016821@darioackermann.ch> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <691747894523180440145931.1352.2026111016821@darioackermann.ch> On Tue, Nov 10, 2026 at 04:08:17PM +0000, Dario Ackermann wrote: > Sorry for the thread-mixup. > > I tested v7.4-rc2 (7475ea8b5861). It still hangs while bringing up CPU1, > with both default AP bringup and cpuhp.parallel=0. Ok, so I don't understand: which kernel did work fine, without any cmdline switches? Pls send full dmesg from that one. IOW, did any kernel at all load microcode successfully on your machine? Also, send one from 7.4 with dis_ucode_ldr on the cmdline. Also, check whether you're running the latest microcode packages by updating your distro blobs. And put your reply under the text you're replying to, like I just did. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette