On Fri, 17 Oct 2025 15:44:21 +0200 Salvatore Bonaccorso wrote: > Control: tags -1 + moreinfo > > Hi Francesco, Hello Salvatore, > > On Sat, Oct 11, 2025 at 06:50:06PM +0200, Francesco Poli wrote: [...] > > $ git checkout v6.13-rc6 > > $ make CC=gcc-14 my_defconfig > > $ make CC=gcc-14 -j 4 bindeb-pkg > > ---------> v6.13-rc6 is good (which is unexpected!) > > > > > > > > What should we deduce from this unexpected result? [...] > > What do you suggest to do, next? > > The suspsect is that you see difference as you end in the self > compiled kernel without enabled IOMMU. (Background; The Debian config > has CONFIG_INTEL_IOMMU_DEFAULT_ON_INTGPU_OFF=y, ntoably this option > does not exist in upstream, so you end with > CONFIG_INTEL_IOMMU_DEFAULT_ON not set only and see the difference. > (if you want to look up what I'm talking, this is > features/x86/intel-iommu-add-kconfig-option-to-exclude-igpu-by-default.patch > in the source). > > before we might suggest you need to use the workaround to disable > iommu, can you please now test the *selfcompiled* v6.13-rc6 with IOMMU > enabled, by booting it with the kernel command line argument > intel_iommu=on. I expect you will see then the problem in same way. Yes, I can confirm. $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-6.13.0-rc6 root=UUID=a5d36947-d90d-4818-9184-7cda88ade7fd ro quiet This is good. $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-6.13.0-rc6 root=UUID=a5d36947-d90d-4818-9184-7cda88ade7fd ro intel_iommu=on quiet This is bad: no audio output or input and the usual flood of error messages in /var/log/kern.log kernel: DMAR: DRHD: handling fault status reg 3 kernel: DMAR: [DMA Write NO_PASID] Request device [00:1b.0] fault addr 0xffa01000 [fault reason 0x0c] non-zero reserved fields in PTE Please let me know how to proceed. Thanks for your kind assistance! -- http://www.inventati.org/frx/ There's not a second to spare! To the laboratory! ..................................................... Francesco Poli . GnuPG key fpr == CA01 1147 9CD2 EFDF FB82 3925 3E1C 27E1 1F69 BFFE
Attachment:
pgpdQCCCJBAPd.pgp
Description: PGP signature