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Fri, 20 Oct 2023 12:39:38 -0700 (PDT) MIME-Version: 1.0 From: Hugo Buddelmeijer Date: Fri, 20 Oct 2023 19:39:27 +0000 Message-ID: Content-Type: text/plain; charset="UTF-8" X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: bug-guix-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Spam-Score: -3.95 X-Migadu-Queue-Id: 4D14554975 X-Migadu-Scanner: mx0.migadu.com X-Migadu-Spam-Score: -3.95 X-TUID: Zmw5l72cDwqB Csepp riseup.net> wrote: > You can use the kernel-arguments option in the operating-system config. > Untested: > (kernel-arguments (cons "i915.enable_guc=0" %default-kernel-arguments)) > This should work, in theory. Thanks, using kernel-arguments indeed works! The idea to use i915.enable_guc came from the arch wiki [1], which states > GuC functionality is controlled by the i915.enable_guc kernel parameter. So I searched the Guix manual for "kernel parameter", and found the sysctl section. > I suspect that the sysctl thing doesn't work because it is done too late > in the boot process. That makes sense now I understand the difference between kernel arguments and parameters in Guix. From the sysctl man page: > sysctl is used to modify kernel parameters at runtime. And that is indeed a bit late for deciding whether to load firmware. About the default value: naively I would think that the default of i915.enable_guc should be changed to 0 in the libre kernel, at least for those chips that do not have free firmware. At least now the term 'wedged' is part of the issue tracker, so other affected people will hopefully find this. This issue can be closed as far as I'm concerned, but I don't know how to do that. Let's try this: /close Thanks again, Hugo [1] https://wiki.archlinux.org/title/Intel_graphics