XPost: linux.debian.kernel   
   From: ben@decadent.org.uk   
      
   On Sat, 2026-02-21 at 17:08 +0100, JohnDoeThe3rd wrote:   
   > My particular use-case is such that 'ddcutil' can issue commands over    
   > the Display Data Channel (DDC), which does not work as    
   > long CONFIG_DRM_AMD_DC is enabled.   
   >    
   > Or do you mean that the 'amdgpu.dc' parameter deprecated? If not, then    
   > it's a regression that should be fixed.   
      
   I can't speak for the amdgpu developers, but they seem to be already   
   very busy with bugs in the default driver configuration.  Since the   
   Display Core code has been around since 2017, I don't think it's   
   reasonable to expect that the old code path continues to be supported   
   for GPUs that Display Core supports.   
      
   It may be more productive to report the problem with ddcutil in Display   
   Core.   
      
   For what it's worth, ddcutil works for me with amdgpu and a monitor   
   connected via HDMI/DVI.  This computer has a slightly newer generation   
   of GPU than yours, though.   
      
   Ben.   
      
   --    
   Ben Hutchings   
   Who are all these weirdos? - David Bowie, on joining IRC   
      
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