Hi Sedat, Sorry for late reply.
Do you still have this issue with newer rc's (like 4.19-rc8)? I checked the dmesg log you attached there, it seems that the vt-d was not on actually. Best regards, Lu Baolu On 9/5/18 8:04 PM, Sedat Dilek wrote:
Hi Joerg, "intel_ioomu=on" was working fine here on my ThinkPad T470 with debian/testing AMD64 with Linux v4.17.y and v4.18.y. With testing Linux v4.19-rc1 and v4.19-rc2 my machine is not booting - black screen. These kernels are built with LLVM/Clang v7.0.0rc2 (v4.18.y too). Furthermore, I switched from GRUB to systemd-boot v239. [ /boot/efi/loader/entries/debian.conf ] title Debian GNU/Linux buster/sid [ debian kernel ] linux /vmlinuz-4.17.0-3-amd64 initrd /initrd.img-4.17.0-3-amd64 options root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro intel_iommu=on [ /boot/efi/loader/entries/debian-llvmlinux.conf ] title Debian GNU/Linux buster/sid [ llvmlinux kernel (EXPERIMENTAL) ] linux /vmlinuz-4.19.0-rc2-3-iniza-llvmlinux initrd /initrd.img-4.19.0-rc2-3-iniza-llvmlinux options root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro Any hints or hints to debug this? Any other kernel boot cheats [1] I can try? My kernel-config and dmesg output is attached. Thanks in advance. Regards, - Sedat - Documentation/intel_txt.txt Documentation/admin-guide/kernel-parameters.txt Documentation/Intel-IOMMU.txt [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kernel-parameters.txt#n1645 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/Intel-IOMMU.txt [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/intel_txt.txt _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
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