From: helmut@subdivi.de   
      
   Hi,   
      
   On Sun, Feb 22, 2026 at 04:47:22PM +0100, Paul Gevers wrote:   
   > Please be aware that the autopkgtest of debvm is doing the same. From the   
   > log [1]:   
      
   Thank you for highlighting this to me. As far as I understand things,   
   the critical piece that makes things stuck is LPA2 (52bit address   
   support). I tried disabling this. What I get is:   
      
   https://salsa.debian.org/helmutg/debvm/-/jobs/9095840   
   | UEFI firmware (version 2025.11-4 built at 01:31:14 on Feb 17 2026)   
   | Synchronous Exception at 0x47EFE008   
      
   Before this change, I only got:   
      
   https://salsa.debian.org/helmutg/debvm/-/jobs/9076802   
   | UEFI firmware (version 2025.11-4 built at 01:31:14 on Feb 17 2026)   
      
   So this seems to indeed make things proceed further, but only so much.   
      
   Any further ideas?   
      
   Completely unrelated, I also got:   
      
   https://salsa.debian.org/helmutg/debvm/-/jobs/9095842   
   | [   22.935909] ------------[ cut here ]------------   
   | 1664   
   | [   22.936407] kernel BUG at arch/x86/kernel/alternative.c:2516!   
   | 1665   
   | [   22.939517] Oops: invalid opcode: 0000 [#1] SMP NOPTI   
   | 1666   
   | [   22.940644] CPU: 0 UID: 0 PID: 311 Comm: (udev-worker) Not tainted   
   6.18.12+deb14-amd64 #1 PREEMPT(lazy)  Debian 6.18.12-1   
   | 1667   
   | [   22.941476] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS   
   2025.11-4 02/17/2026   
      
   This one is not reproducible (neither on salsa nor locally).   
      
   I'm a bit stuck on all these hangs, but qemu seems to be stuck migrating   
   to forky due to this.   
      
   Helmut   
      
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