Hello. I am trying to work with a Franka Emika Panda Robot Arm and to do so I need to run a real time kernel on my Linux PC. This tutorial/walkthrough is my primary source of information- https://frankaemika.github.io/docs/installation_linux.html#setting-up-the-real-time-kernel I installed kernel 5.9.1 and added a rt patch which went fine but it did not seem to run when chosen from the grub menu the screen went blank and nothing seemed to happen. I found that a rt patch existed for the current kernel 5.13. - uname -r returns 5.13.0-44-generic. I remove the 5.9.1 files (possibly poorly as I failed to use --purge). I then download and verify the new kernel and patch files. Patch the kernel and set up .config file to choose Preemptable kernel (Real-Time). Then I compile it, it produces linux-upstream files which I did not expect. Making the kernel looked good and then fails with the following error- Initially it gives the following warnings- dpkg-source: warning: source directory 'linux-5.13' is not <sourcepackage>-<upstreamversion> 'linux-upstream-5.13.0-rt1' dpkg-source: warning: .orig directory name linux-5.13.orig is not <package>-<upstreamversion> (wanted linux-upstream-5.13.0-rt1.orig) dpkg-source: info: building linux-upstream using existing linux-upstream_5.13.0-rt1.orig.tar.gz dpkg-source: info: building linux-upstream in linux-upstream_5.13.0-rt1-1.diff.gz dpkg-source: warning: ignoring deletion of file .scmversion dpkg-source: warning: the diff modifies the following upstream files: and then fails- make[2]: *** [debian/rules:7: build-arch] Error 2 dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2 make[1]: *** [scripts/Makefile.package:77: deb-pkg] Error 2 make: *** [Makefile:1565: deb-pkg] Error 2 I re-did the command hoping it would just work, unsurprisingly it didn't and gave the following output- mailto:lab@panda:~/linux-5.13$ make -j8 deb-pkg make clean CLEAN arch/x86/crypto CLEAN arch/x86/entry/vdso CLEAN arch/x86/purgatory CLEAN arch/x86/realmode/rm CLEAN arch/x86/kernel/cpu CLEAN arch/x86/kernel CLEAN certs CLEAN kernel/debug/kdb CLEAN kernel CLEAN usr CLEAN fs/unicode CLEAN arch/x86/tools CLEAN resolve_btfids sh ./scripts/package/mkdebian TAR linux-upstream.tar.gz origversion=$(dpkg-parsechangelog -SVersion |sed 's/-[^-]*$//');\ mv linux-upstream.tar.gz ../linux-upstream_${origversion}.orig.tar.gz dpkg-buildpackage -r"fakeroot -u" -a$(cat debian/arch) -i.git -us -uc dpkg-buildpackage: info: source package linux-upstream dpkg-buildpackage: info: source version 5.13.0-rt1-1 dpkg-buildpackage: info: source distribution focal dpkg-buildpackage: info: source changed by lab <lab@panda> dpkg-buildpackage: info: host architecture amd64 dpkg-source -i.git --before-build . debian/rules clean rm -rf debian/*tmp debian/files make clean dpkg-source -i.git -b . dpkg-source: info: using source format '1.0' dpkg-source: warning: source directory 'linux-5.13' is not <sourcepackage>-<upstreamversion> 'linux-upstream-5.13.0-rt1' dpkg-source: warning: .orig directory name linux-5.13.orig is not <package>-<upstreamversion> (wanted linux-upstream-5.13.0-rt1.orig) dpkg-source: info: building linux-upstream using existing linux-upstream_5.13.0-rt1.orig.tar.gz dpkg-source: info: building linux-upstream in linux-upstream_5.13.0-rt1-1.diff.gz dpkg-source: error: cannot represent change to vmlinux-gdb.py: dpkg-source: error: new version is symlink to /home/lab/linux-5.13/scripts/gdb/vmlinux-gdb.py dpkg-source: error: old version is nonexistent dpkg-source: warning: ignoring deletion of file .scmversion dpkg-source: warning: the diff modifies the following upstream files: .clang-format .cocciconfig .config.old .get_maintainer.ignore .mailmap CREDITS MAINTAINERS README dpkg-source: info: use the '3.0 (quilt)' format to have separate and documented changes to upstream files, see dpkg-source(1) dpkg-source: error: unrepresentable changes to source dpkg-buildpackage: error: dpkg-source -i.git -b . subprocess returned exit status 1 make[1]: *** [scripts/Makefile.package:77: deb-pkg] Error 1 make: *** [Makefile:1565: deb-pkg] Error 2 I suspect I am having problems because I am making another kernel which is similar/identical to the current default. Any help would be gratefully received. Kind regards Tony [THE]
