On Tue, Jan 3, 2017 at 3:23 AM, Lukas Wunner <lukas@xxxxxxxxx> wrote: > On Mon, Jan 02, 2017 at 02:45:00PM -0700, Chris Murphy wrote: >> On Mon, Jan 2, 2017 at 2:28 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: >> > Considering that the failed boot log contains no USB messages at all, >> > and no messages referring to PCI bus 0000:37 (the bus associated with >> > the adapter), this certainly looks like a PCI problem. >> >> I see these lines in the problem case, which don't occur in the working case. >> >> [ 0.561046] pci_bus 0000:37: busn_res: [bus 37-ff] end is updated to 37 >> [ 0.561047] pci_bus 0000:37: busn_res: can not insert [bus 37] >> under domain [bus 00-ff] (conflicts with (null) [bus 00-fe]) > > In the "failure dmesg" (with the adapter plugged in on boot), bus 37 is > considered a root bus: > > [ 0.560662] PCI: Discovered peer bus 37 > [ 0.560667] PCI: root bus 37: using default resources > [ 0.560668] PCI: Probing PCI hardware (bus 37) > [ 0.560695] ACPI: \: failed to evaluate _DSM (0x1001) > [ 0.560698] PCI host bridge to bus 0000:37 > > Whereas in the "normal behaviour" dmesg (with the adapter plugged in > after booting Linux), bus 37 is below downstream port 0000:02:02.0 > (this belongs to the PCIe switch of the Thunderbolt controller): > > [ 59.247680] pci 0000:02:02.0: scanning [bus 37-37] behind bridge, pass 0 > [ 59.247915] pci_bus 0000:37: scanning bus > [ 59.247963] pci 0000:37:00.0: [8086:15b6] type 00 class 0x0c0330 > [ 59.248014] pci 0000:37:00.0: reg 0x10: [mem 0xc7f00000-0xc7f0ffff] > [ 59.248360] pci 0000:37:00.0: supports D1 D2 > [ 59.248366] pci 0000:37:00.0: PME# supported from D0 D1 D2 D3hot D3cold > [ 59.248379] pci 0000:37:00.0: PME# disabled > [ 59.248951] pci_bus 0000:37: fixups for bus > [ 59.248959] pci 0000:02:02.0: PCI bridge to [bus 37] > [ 59.249117] pci 0000:02:02.0: bridge window [mem 0xc7f00000-0xc7ffffff] > [ 59.249135] pci_bus 0000:37: bus scan returning with max=37 > > Could be an error in the ACPI tables, could be a misconfiguration in > the EEPROM of the Thunderbolt controller. Attached acpidump to the bug report. The problem doesn't affect GRUB. It's able to find USB devices on this adapter in the pre-boot environment, load kernel and initramfs. And also Windows 10 can boot from USB stick media with this adapter on these two gen 2 ports. The non-Thunderbolt, USC-B 3.1 gen1 port can be used to boot Linux, however. The catch there is this is also the power port. So the choice is to either use power or boot from that port. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
