On 2014-11-24 22:47, Rebecca N. Palmer wrote: First of all, many thanks for analyzing the problem and keeping track of the many duplicates!
> (Should we merge these bugs? Also, #767803 looks like another instance > of this, though it doesn't have the apt log to confirm it yet) and perhaps move the discussion to one of these bugs and trim the Cc list a bit ... If you merge them, please reassign them to src:nvidia-driver and add Affects for the packages where they have been reported. >> * nvidia-kernel-dkms: Switch to Recommends: nvidia-driver | libcuda1 >> to break the chain libcuda1 -> nvidia-kernel-dkms -> nvidia-driver. > ...or drop this Recommends: entirely That Recommends has been there since nvidia-kernel-dkms was added in 2010. I thinks its main purpose is for people that try to install the wrong package (i.e. nvidia-kernel-dkms instead of nvidia-driver (or nvidia-glx back then)) to get a working NVIDIA driver installation (well, still needs some manual configuration, but debconf will tell you that). I don't want to touch (as in remove) that right now. > (IIRC circular Depends/Recommends > are discouraged because they confuse apt's autoremover, though I can't > find where I saw that). I don't want to workaround bugs in unrelated packages > Cutting the chain here (tested with "apt-get install nvidia-libopencl1 > nvidia-driver-", the - after a package means "remove/don't install") > does still allow much of nvidia-* (including nvidia-kernel-dkms and > glx-alternative-nvidia) to be installed, but that appears to be harmless and you get the full set of lib*GL* diversions, too ... this and some more are needed to allow switching between nvidia-opencl-icd and nvidia$LEGACY-opencl-icd which will become available once I fork off (and backport) nvidia-graphics-drivers-legacy-340xx after the jessie release. > without libgl1-nvidia-glx (at least on my Intel IvyBridge M GT2, both > graphics and OpenCL continue to work after rebooting). That would be a bug otherwise :-) > Given that the error on loading nvidia-opencl-icd in a non-Nvidia system is > > modprobe: ERROR: could not insert 'nvidia_current': No such device > > it is plausible that nvidia-opencl-icd uses the nvidia kernel module > (i.e. nvidia-kernel-dkms | nvidia-kernel-<version>) and as such _should_ > pull it in (whether or not it also needs libcuda1), In wheezy all this OpenCL stuff was rather new and only proprietary implementations were available ... as a result installing nvidia-opencl-icd was harmless (due to lack of dependencies) but also useless (due to lack of dependencies) unless you had nvidia-driver installed, too. This I wanted to fix in jessie :-) > while #768185 > suggests that nvidia-opencl-icd works without the graphics side (can > someone check that?), I'm pretty sure NVIDIA CUDA and OpenCL work in headless setups, i.e. without X server running. They just need the kernel module to be loaded (and the corresponding device to be created). (Contrary to AMD which needs X to communicate with the GPU for doing OpenCL) > making this the more correct place to cut the chain. Andreas -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/547472c0.3030...@debian.org