Hi, all, My desktop is f21/Xen 4.4 and the Dom0 crashes if it's 3.17.8-300 or later. 3.17.7-300 is stable. The crashing Dom0 kernels are stable as baremetal kernels. I've tried getting 3.18 from -testing and rebuilding 4.4 locally and get the same thing. Serial output here: http://fpaste.org/173093/ Looking for ideas about what could be going on and/or how to figure out what is going wrong once Dom0 starts. (XEN) Command line: placeholder dom0_mem=12288M,max:12288M loglvl=all guest_loglvl=all com1=115200,8n1 console=com1,vga [ 0.000000] Command line: placeholder root=/dev/mapper/luks-ba790367-2232-475a-ae19-82bbf7f7ccc5 ro earlyprintk=xen ipv6.disable=1 selinux=0 elevator=deadline rootflags=data=journal,relatime The last lines are: (XEN) PCI add device 0000:04:00.0 (XEN) Domain 0 crashed: rebooting machine in 5 seconds. and device 4:00.0 is the USB controller, but I suspect it's what's happening next that's crashing. The baremetal boot near there is: [ 0.217464] pci 0000:04:00.0: [1b21:1142] type 00 class 0x0c0330 [ 0.217488] pci 0000:04:00.0: reg 0x10: [mem 0xf7800000-0xf7807fff 64bit] [ 0.217611] pci 0000:04:00.0: PME# supported from D3cold [ 0.217635] pci 0000:04:00.0: System wakeup disabled by ACPI [ 0.219323] pci 0000:00:1c.6: PCI bridge to [bus 04] [ 0.219395] pci 0000:00:1c.6: bridge window [mem 0xf7800000-0xf78fffff] [ 0.219416] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) [ 0.220032] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 *11 12 14 15) [ 0.220266] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled. [ 0.220573] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 10 *11 12 14 15) [ 0.220803] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 *10 11 12 14 15) [ 0.221032] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 *5 6 10 11 12 14 15) [ 0.221264] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled. [ 0.221569] ACPI: PCI Interrupt Link [LNKG] (IRQs *3 4 5 6 10 11 12 14 15) [ 0.221799] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 *10 11 12 14 15) [ 0.222099] ACPI: Enabled 5 GPEs in block 00 to 3F [ 0.222252] vgaarb: setting as boot device: PCI:0000:00:02.0 [ 0.222321] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none but I don't know enough about Xen boot to know if that's even useful information. Thanks, -Bill -- Bill McGonigle, Owner BFC Computing, LLC http://bfccomputing.com/ Telephone: +1.855.SW.LIBRE Email, IM, VOIP: bill@xxxxxxxxxxxxxxxx VCard: http://bfccomputing.com/vcard/bill.vcf Social networks: bill_mcgonigle/bill.mcgonigle -- xen mailing list xen@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/xen