DrVenabili

Update: unfortunately it didn't boot with iommu=off. Since I couldn't get the WebUI up there was no easy way of changing it back or trying iommu=pt, so I ended up restoring from a 6.9.2 flash backup from yesterday. Too bad for the built-in wireguard support, but I guess I'll stay on 6.9.2 for a while. Thank you again for your help JorgeB.

Thank you JorgeB! Physical access to the machine is a bit difficult (no VGA monitor etc) so I can't really disable IOMMU in the BIOS. I've followed the instructions here and set it to `iommu=off` instead of `pt`, as I don't think I need it. I do have a GPU for Plex transcoding, but it's in a docker and not a VM. Parity check is running now so I can't reboot immediately, but I'll report back once it's done. Double thanks for your help -- yesterday your guide here saved me when the cache wouldn't mount.

Hi! Have you found a solution? I've just updated to 6.10.0 (stable) and I have the exact same issue. Also a Microserver Gen8 like you. Thanks! May 19 00:35:13 terminus kernel: DMAR: ERROR: DMA PTE for vPFN 0x8e07f already set (to 8e07f003 not 23603e801) May 19 00:35:13 terminus kernel: ------------[ cut here ]------------ May 19 00:35:13 terminus kernel: WARNING: CPU: 7 PID: 8 at drivers/iommu/intel/iommu.c:2408 __domain_mapping+0x2e5/0x390 May 19 00:35:13 terminus kernel: Modules linked in: nvidia_modeset(PO) nvidia_uvm(PO) xt_nat xt_tcpudp veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter xfs md_mod nvidia(PO) drm backlight ip6table_filter ip6_tables iptable_filter ip_tables x_tables bonding tg3 x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm i2c_core crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel crypto_simd cryptd rapl intel_cstate acpi_ipmi intel_uncore ahci thermal libahci ipmi_si acpi_power_meter button [last unloaded: tg3] May 19 00:35:13 terminus kernel: CPU: 7 PID: 8 Comm: kworker/u128:0 Tainted: P W IO 5.15.40-Unraid #1 May 19 00:35:13 terminus kernel: Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 06/06/2014 May 19 00:35:13 terminus kernel: Workqueue: loop2 loop_rootcg_workfn May 19 00:35:13 terminus kernel: RIP: 0010:__domain_mapping+0x2e5/0x390 May 19 00:35:13 terminus kernel: Code: 2b 48 8b 4c 24 08 48 89 c2 4c 89 e6 48 c7 c7 29 b1 11 82 e8 f2 86 2d 00 8b 05 34 9b df 00 85 c0 74 08 ff c8 89 05 28 9b df 00 <0f> 0b 8b 74 24 38 b8 34 00 00 00 8d 0c f6 83 e9 09 39 c1 0f 4f c8 May 19 00:35:13 terminus kernel: RSP: 0018:ffffc90000053600 EFLAGS: 00010046 May 19 00:35:13 terminus kernel: RAX: 0000000000000000 RBX: ffff888107b7f3f8 RCX: 0000000000000027 May 19 00:35:13 terminus kernel: RDX: 0000000000000000 RSI: ffffc90000053490 RDI: ffff888456fdc510 May 19 00:35:13 terminus kernel: RBP: ffff888107968000 R08: ffff888467f307a8 R09: 0000000000000000 May 19 00:35:13 terminus kernel: R10: 2931303865333036 R11: 333036333220746f R12: 000000000008e07f May 19 00:35:13 terminus kernel: R13: ffff888107b7f058 R14: 0000000000001000 R15: 000000008e00b000 May 19 00:35:13 terminus kernel: FS: 0000000000000000(0000) GS:ffff888456fc0000(0000) knlGS:0000000000000000 May 19 00:35:13 terminus kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 19 00:35:13 terminus kernel: CR2: 0000153b7aa0aff8 CR3: 000000000220a006 CR4: 00000000000606e0 May 19 00:35:13 terminus kernel: Call Trace: May 19 00:35:13 terminus kernel: <TASK> May 19 00:35:13 terminus kernel: intel_iommu_map_pages+0xf3/0x102 May 19 00:35:13 terminus kernel: __iommu_map+0x138/0x211 May 19 00:35:13 terminus kernel: __iommu_map_sg+0x8c/0x110 May 19 00:35:13 terminus kernel: iommu_dma_map_sg+0x21e/0x3bc May 19 00:35:13 terminus kernel: __dma_map_sg_attrs+0x63/0x95 May 19 00:35:13 terminus kernel: dma_map_sg_attrs+0xa/0x12 May 19 00:35:13 terminus kernel: ata_qc_issue+0xec/0x1ab May 19 00:35:13 terminus kernel: __ata_scsi_queuecmd+0x1f2/0x1fd May 19 00:35:13 terminus kernel: ata_scsi_queuecmd+0x41/0x7a May 19 00:35:13 terminus kernel: scsi_queue_rq+0x57d/0x6db May 19 00:35:13 terminus kernel: blk_mq_dispatch_rq_list+0x2a7/0x4da May 19 00:35:13 terminus kernel: blk_mq_do_dispatch_sched+0x262/0x2eb May 19 00:35:13 terminus kernel: __blk_mq_sched_dispatch_requests+0xcb/0x11a May 19 00:35:13 terminus kernel: blk_mq_sched_dispatch_requests+0x2f/0x52 May 19 00:35:13 terminus kernel: __blk_mq_run_hw_queue+0x50/0x76 May 19 00:35:13 terminus kernel: __blk_mq_delay_run_hw_queue+0x4d/0x108 May 19 00:35:13 terminus kernel: blk_mq_sched_insert_requests+0xa2/0xd9 May 19 00:35:13 terminus kernel: blk_mq_flush_plug_list+0xfb/0x12c May 19 00:35:13 terminus kernel: blk_finish_plug+0x1f/0x2c May 19 00:35:13 terminus kernel: __iomap_dio_rw+0x4cb/0x667 May 19 00:35:13 terminus kernel: ? btrfs_get_32+0x72/0xdf May 19 00:35:13 terminus kernel: iomap_dio_rw+0xa/0x25 May 19 00:35:13 terminus kernel: btrfs_file_write_iter+0x1cf/0x360 May 19 00:35:13 terminus kernel: lo_rw_aio.isra.0+0x1e7/0x234 May 19 00:35:13 terminus kernel: loop_process_work+0x58e/0x7f4 May 19 00:35:13 terminus kernel: ? arch_local_irq_save+0x11/0x17 May 19 00:35:13 terminus kernel: ? _raw_spin_lock_irqsave+0x11/0x33 May 19 00:35:13 terminus kernel: ? _raw_spin_unlock_irqrestore+0xe/0x1b May 19 00:35:13 terminus kernel: ? try_to_wake_up+0x1db/0x20f May 19 00:35:13 terminus kernel: process_one_work+0x198/0x27a May 19 00:35:13 terminus kernel: worker_thread+0x19c/0x240 May 19 00:35:13 terminus kernel: ? rescuer_thread+0x28b/0x28b May 19 00:35:13 terminus kernel: kthread+0xde/0xe3 May 19 00:35:13 terminus kernel: ? set_kthread_struct+0x32/0x32 May 19 00:35:13 terminus kernel: ret_from_fork+0x22/0x30 May 19 00:35:13 terminus kernel: </TASK> May 19 00:35:13 terminus kernel: ---[ end trace c6108c4172f1d487 ]--- May 19 00:35:13 terminus kernel: DMAR: ERROR: DMA PTE for vPFN 0x8e080 already set (to 8e080003 not 23603f801)