From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lu Baolu Subject: Re: [Linux-4.19] ThinkPad T470 not booting with "intel_iommu=on" Date: Thu, 18 Oct 2018 15:04:35 +0800 Message-ID: <0696f645-d2df-23fd-d268-233a748ffff5@linux.intel.com> References: <95f69db6-becd-adce-5477-264de839bcd8@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: sedat.dilek-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: iommu@lists.linux-foundation.org Hi, On 10/18/18 2:52 PM, Sedat Dilek wrote: > On Tue, Oct 16, 2018 at 8:37 AM Lu Baolu wrote: >> >> 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. >> > > Here my kernel-config and dmesg-logs for Linux v4.19-rc8. Any issues are you seeing? I didn't see any error in the dmesg dump. Best regards, Lu Baolu > > - sed@ - > >> >> 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-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org >>> https://lists.linuxfoundation.org/mailman/listinfo/iommu >>>