XPost: linux.debian.bugs.dist   
   From: carnil@debian.org   
      
   Contol: tags -1 + moreinfo upstream   
      
   On Sun, Jan 18, 2026 at 10:10:39AM -0600, Michael Frotscher wrote:   
   > Package: src:linux   
   > Version: 6.12.63-1   
   > Severity: normal   
   > X-Debbugs-Cc: debian-amd64@lists.debian.org   
   > User: debian-amd64@lists.debian.org   
   > Usertags: amd64   
   >   
   > Dear Maintainer,   
   >   
   >    * What led up to the situation? Kernel upgrade. No errors in boot log,   
   card   
   > shows up in lspci and the appropriate devices in /dev, but card fails to   
   > acquire channel lock for any channel.   
   >    * What exactly did you do (or not do) that was effective (or   
   >      ineffective)? Booted previous stable kernel 6.12.57+deb13-amd64   
   >    * What was the outcome of this action? TV card works as expected   
   >    * What outcome did you expect instead? None   
      
   Thanks, as you can confirm the regreession from previous 6.12.57-1,   
   can you please bisect the changes to 6.12.63 to identify the breaking   
   commit? That would involve compiling and testing a few kernels:   
      
       git clone --single-branch -b linux-6.12.y https://git.kernel   
   org/pub/scm/linux/kernel/git/stable/linux-stable.git   
       cd linux-stable   
       git checkout v6.12.57   
       cp /boot/config-$(uname -r) .config   
       yes '' | make localmodconfig   
       make savedefconfig   
       mv defconfig arch/x86/configs/my_defconfig   
      
       # test 6.12.57 to ensure this is "good"   
       make my_defconfig   
       make -j $(nproc) bindeb-pkg   
       ... install the resulting .deb package and confirm the card works.   
      
       # test 6.12.63 to ensure this is "bad"   
       git checkout v6.12.63   
       make my_defconfig   
       make -j $(nproc) bindeb-pkg   
       ... install the resulting .deb package and confirm the problem exists.   
      
   With that confirmed, the bisection can start:   
      
       git bisect start   
       git bisect good v6.12.57   
       git bisect bad v6.12.63   
      
   In each bisection step git checks out a state between the oldest   
   known-bad and the newest known-good commit. In each step test using:   
      
       make my_defconfig   
       make -j $(nproc) bindeb-pkg   
       ... install, verify the if problem exists.   
      
   and if the problem is hit run:   
      
       git bisect bad   
      
   and if the problem doesn't trigger run:   
      
       git bisect good   
      
   . Please pay attention to always select the just built kernel for   
   booting, it won't always be the default kernel picked up by grub.   
      
   Iterate until git announces to have identified the first bad commit.   
      
   Then provide the output of   
      
       git bisect log   
      
   In the course of the bisection you might have to uninstall previous   
   kernels again to not exhaust the disk space in /boot. Also in the end   
   uninstall all self-built kernels again.   
      
   Regards,   
   Salvatore   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)