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CONFIG_FB_DEVICE optional To: sukrut heroorkar , Thomas Zimmermann , Mikulas Patocka Cc: David Hunter , kernel test robot , Bernie Thompson , Arnd Bergmann , Randy Dunlap , Bartosz Golaszewski , Zsolt Kajtar , Gonzalo Silvalde Blanco , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, skhan@linuxfoundation.org References: <20250924175743.6790-1-hsukrut3@gmail.com> <202509272320.3K8kdDCw-lkp@intel.com> <41ef536d-2399-43f8-8041-c6b0e642aba2@suse.de> Content-Language: en-US From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= xsFNBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV 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Please >>>> let me know how to proceed in this case. >>> >>> Look at the reported build error, which seems to happen in dev_dbg(). >>> So, maybe in your testing you did not have debugging enabled? >>> The report contains the .config file with which you can test. >> >> Can we rather make an effort to remove the udlfb driver entirely? A few >> years back, there was one user who was still using it because of some >> problems with the DRM udl driver. But I think we've addressed them. The >> discussion is at [1]. Would be good to know if they issues/crashes really have been solved. In [1] it seems the crashes still happened with DRM. > Should I send a patch series to completely remove udlfb,=20 No. (at least not yet) > since [1] echoed that DRM udl driver is good enough? >> [1] https://lore.kernel.org/dri-devel/20201130125200.10416-1-tzimmerman= n@suse.de/ Well, some people who do *NOT* actively use fbdev with the old cards say the DRM replacements are "good enough". For tThose people who really depend on fbdev and the speed it has over DRM, the DRM "basic-drivers" are simply a nice-to-have-but-not-really= -useable type of drivers. So, unless the really affected people say the DRM replacement is fully usable, we need to keep the fbdev driver. Helge