Launchpad has imported 2 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=44510.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2012-01-05T21:17:01+00:00 Leann Ogasawara wrote: Hi, I'm forwarding this bug on behalf of an Ubuntu bug reporter Jamie Strandboge: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911236 On a Lenovo X201s running an Ubuntu 3.2.0-7.13-generic kernel which was rebased on upstream v3.2-rc7 Jamie's witnessing repeated fault messages in dmesg and experiencing system 'pauses' every few seconds. The repeated dmesg output is as follows: [ 56.996322] DRHD: handling fault status reg 2 [ 56.996330] DMAR:[DMA Write] Request device [00:02.0] fault addr 7bf1c7000 [ 56.996332] DMAR:[fault reason 05] PTE Write access is not set 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller]) Jamie can confirm that booting with 'intel_iommu=igfx_off' resolves the issue and he no longer sees the repeated messages nor experiences the system pausing. His full lspci output can be seen at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911236/+attachment/2655442/+files/Lspci.txt And dmesg output at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911236/+attachment/2655434/+files/BootDmesg.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/911236/+attachment/2655439/+files/CurrentDmesg.txt Please let us know if you need any additional information. Thanks in advance. Reply at: https://bugs.launchpad.net/linux/+bug/911236/comments/6 ------------------------------------------------------------------------ On 2012-01-05T21:46:45+00:00 Roland Dreier wrote: I have the same issue with a Lenovo T410s (updated to latest BIOS); I see I have the 8086:0044 device that triggers quirk_calpella_no_shadow_gtt() in intel-iommu.c, but the PCI header is such that I hit the second clause in: static void __devinit quirk_calpella_no_shadow_gtt(struct pci_dev *dev) { unsigned short ggc; if (pci_read_config_word(dev, GGC, &ggc)) return; if (!(ggc & GGC_MEMORY_VT_ENABLED)) { printk(KERN_INFO "DMAR: BIOS has allocated no shadow GTT; disabling IOMMU for graphics\n"); dmar_map_gfx = 0; } else if (dmar_map_gfx) { /* we have to ensure the gfx device is idle before we flush */ printk(KERN_INFO "DMAR: Disabling batched IOTLB flush on Ironlake\n"); intel_iommu_strict = 1; } } so I see: [ 0.802361] DMAR: Disabling batched IOTLB flush on Ironlake in my kernel log, but then I get a stream of [ 98.467011] DRHD: handling fault status reg 2 [ 98.467014] DMAR:[DMA Write] Request device [00:02.0] fault addr 400020000 [ 98.467038] DMAR:[fault reason 05] PTE Write access is not set "intel_iommu=igfx_off" resolves this for me as well. Full lspci: 00:00.0 Host bridge [0600]: Intel Corporation Core Processor DRAM Controller [8086:0044] (rev 02) 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) 00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06) 00:16.3 Serial controller [0700]: Intel Corporation 5 Series/3400 Series Chipset KT Controller [8086:3b67] (rev 06) 00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection [8086:10ea] (rev 06) 00:1a.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b3c] (rev 06) 00:1b.0 Audio device [0403]: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio [8086:3b57] (rev 06) 00:1c.0 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 [8086:3b42] (rev 06) 00:1c.1 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 [8086:3b44] (rev 06) 00:1c.3 PCI bridge [0604]: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 [8086:3b48] (rev 06) 00:1d.0 USB controller [0c03]: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller [8086:3b34] (rev 06) 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev a6) 00:1f.0 ISA bridge [0601]: Intel Corporation 5 Series/3400 Series Chipset LPC Interface Controller [8086:3b0f] (rev 06) 00:1f.2 SATA controller [0106]: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller [8086:3b2f] (rev 06) 00:1f.3 SMBus [0c05]: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller [8086:3b30] (rev 06) 00:1f.6 Signal processing controller [1180]: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem [8086:3b32] (rev 06) 03:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 1000 [8086:0084] ff:00.0 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers [8086:2c62] (rev 02) ff:00.1 Host bridge [0600]: Intel Corporation Core Processor QuickPath Architecture System Address Decoder [8086:2d01] (rev 02) ff:02.0 Host bridge [0600]: Intel Corporation Core Processor QPI Link 0 [8086:2d10] (rev 02) ff:02.1 Host bridge [0600]: Intel Corporation Core Processor QPI Physical 0 [8086:2d11] (rev 02) ff:02.2 Host bridge [0600]: Intel Corporation Core Processor Reserved [8086:2d12] (rev 02) ff:02.3 Host bridge [0600]: Intel Corporation Core Processor Reserved [8086:2d13] (rev 02) Reply at: https://bugs.launchpad.net/linux/+bug/911236/comments/8 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/911236 Title: DMAR:[fault reason 05] PTE Write access is not set To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/911236/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
