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Sun, 21 Apr 2024 12:15:40 -0400 Received: from mail-40134.protonmail.ch ([185.70.40.134]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ryZqf-0005Nx-Pv for guix-devel@gnu.org; Sun, 21 Apr 2024 12:15:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1713716121; x=1713975321; bh=es3KvbOXZkmqmv/TAl+eHNTni9FXntOsvTG9XwXLXkU=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=fGUKS2GHxWVNiQ3X0oXFNEaksJhUpz9zaEKVEfZhrhkGbB0iFT/AeUwanEuOMwgG/ vIA5bf/Nxn0otnyHHZNpChPbzJC4m5xeB559o7W+pNeLjKfaLloSFexfrOev9BaGvq SAUcbhhkLChjV+tMDhhg33SMnhROeqiCRTxEHJ4t7hl++t7oLbbqWLyHdjOdnU3Vv8 NZ14q69Q9NuarSTHvpqGX1rjmyk/rxbrDbqTkEjtcL1L/RKb3SIAzjZii3qctlHNH5 uyy5btksJMXboQQPZSq/C0P/XnG0ISR5taMxG4uRDNbldTo/uUG1Z7Dwoo8Btuf+8N jYBUCUwdYHAGQ== Date: Sun, 21 Apr 2024 16:15:10 +0000 To: "Felix Lechner via \"Development of GNU Guix and the GNU System distribution.\"" From: John Kehayias Cc: =?utf-8?Q?Ludovic_Court=C3=A8s?= , Felix Lechner Subject: Re: System can no longer be reconfigured Message-ID: <87sezeitff.fsf@protonmail.com> In-Reply-To: <87y1964sok.fsf@lease-up.com> References: <87cyqm61aw.fsf@lease-up.com> <87ttjxcdku.fsf@gnu.org> <87y1964sok.fsf@lease-up.com> Feedback-ID: 7805494:user:proton X-Pm-Message-ID: b94faf031721b008ad09bca6fa1bca0681b67fd0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=185.70.40.134; envelope-from=john.kehayias@protonmail.com; helo=mail-40134.protonmail.ch X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Spam-Score: -9.78 X-Migadu-Scanner: mx11.migadu.com X-Spam-Score: -9.78 X-Migadu-Queue-Id: DC106B89F X-TUID: hrmIOFlNQR6A Dear Felix et al, On Sun, Apr 21, 2024 at 08:54 AM, Felix Lechner via \"Development of GNU Gu= ix and the GNU System distribution.\" wrote: > Hi Ludo' > > On Fri, Apr 19 2024, Ludovic Court=C3=A8s wrote: > >> Is it not hanging during Shepherd service upgrade? > > Yes, thank you! It was hanging during the Shepherd system upgrade due > to an invalid calendar-event specification. In a service that uses both > #:days-of-month as well as #:days-of-week, I got confused because the > count starts with one in one, and with zero in the other. [1] > > Thank you for your kind pointer in another forum! The issue is now > solved. > > On this occasion, please allow me to mention for everyone's benefit that > your support level for the Shepherd is very generous---especially when > the complaints involve repeated user errors by the people bothering you. > >> If that is the case, (1) that is not preventing upgrade from happening >> since that=E2=80=99s the very last step (it just means you=E2=80=99ll ha= ve to reboot), > > Yes, but 'reboot' and 'halt' also stop working, which meant that I > issued 'sync' a few times and then, crossing my fingers, pressed the > reset button a few hundreds of a second later. I wish there were a way > to force a reboot. > Not sure if this is what you did, but for anyone else that didn't know this (like me, for many years!) there is the Magic SysRq Key to talk directly to the kernel: I always remember "BUSIER" backwards as the sequence to push to safely stop everything, sync disks, and reboot, without needing to use the power button. Or the mnemonics: "raising elephants is so utterly boring" or "reboot even if system utterly broken." Hopefully rarely needed, but really handy when it is. (I wrote a whole basic guide to killing things and these last keys: ) >> (2) it=E2=80=99s a shepherd-related bug for which perhaps there are clue= s in >> /var/log/messages? > > Thank you for that pointer, too. I'm still learning about where to look > for error messages, whose destination is not always obvious to me. > > Kind regards > Felix > > [1] >