apport information ** Attachment added: "ProcEnviron.txt" https://bugs.launchpad.net/bugs/1577018/+attachment/4669758/+files/ProcEnviron.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1577018 Title: Kernel crashes on dom0 startup when dom0_mem is set if BIOS is buggy (e. g. GA-78LMT-USB3 Rev 5.0 BIOS FA) Status in linux package in Ubuntu: Confirmed Bug description: Description: Ubuntu 16.04 LTS Release: 16.04 linux-image-generic: Installiert: 4.4.0.21.22 Installationskandidat: 4.4.0.21.22 Versionstabelle: *** 4.4.0.21.22 500 500 http://at.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 100 /var/lib/dpkg/status I would expect the system to boot up like it did before I upgraded to xenial When I try to boot my virtual machine host using a xenial based Xen system (Xen 4.6, linux generic 4.4.0) it crashes immediately. My system setup is non standard as I tried to fix the dom0 memory using dom0_mem. This is due to this FAQ entry: http://zfsonlinux.org/faq.html#CanIRunZFSForXenHypervisor . I use ZFS for virutal machine disks and other storage. The systems bios is not updated by manufacturer anymore (2013). The on board graphics card is used. Shared graphics memory is set to auto. Setting it to 128 MB didn't change anything. Using a wily kernel 4.2.0 generic or a 4.1.22 mainline kernel works. Using a mainline kernel 4.4.8 or 4.5.2 also crashes. A quick google search using the first crash report line leads to this https://lkml.org/lkml/2015/8/19/366 and this http://code.metager.de/source/history/linux/stable/arch/x86/xen/ I checked that the two patches that seem most relevant here are present in the ubuntu kernel. Workaround is to not force a particular amount of memory for dom0 (delete dom0_mem parameter) --- ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vmadmin 8784 F.... pulseaudio /dev/snd/controlC1: vmadmin 8784 F.... pulseaudio CurrentDesktop: MATE DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=3352f7fa-317a-4ffc-8890-b1c7e45d183c InstallationDate: Installed on 2015-06-27 (309 days ago) InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1) MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: placeholder root=UUID=0ccd0adc-fe68-4104-a524-6e1589a167df ro net.ifnames=0 rootwait rootdelay=30 usbcore.autosuspend=120 usbcore.old_scheme_first=1 usbcore.initial_descriptor_timeout=60 usb-storage.delay_use=10 console=hvc0 console=tty0 earlyprintk=xen quiet splash nomdmonddf nomdmonisw ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 RelatedPackageVersions: linux-restricted-modules-4.4.0-21-generic N/A linux-backports-modules-4.4.0-21-generic N/A linux-firmware 1.157 RfKill: Tags: xenial Uname: Linux 4.4.0-21-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-04-24 (7 days ago) UserGroups: adm cdrom dialout dip fax floppy fuse libvirtd lpadmin plugdev sambashare sudo tape video _MarkForUpload: True dmi.bios.date: 04/23/2013 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: FA dmi.board.name: GA-78LMT-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFA:bd04/23/2013:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-78LMT-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. --- ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: vmadmin 7610 F.... pulseaudio /dev/snd/controlC1: vmadmin 7610 F.... pulseaudio CurrentDesktop: MATE DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=3352f7fa-317a-4ffc-8890-b1c7e45d183c InstallationDate: Installed on 2015-06-27 (332 days ago) InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1) MachineType: System manufacturer System Product Name NonfreeKernelModules: zfs zunicode zcommon znvpair zavl Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: placeholder root=UUID=0ccd0adc-fe68-4104-a524-6e1589a167df ro dom0_mem=8G,min:8G,max:8G net.ifnames=0 rootwait rootdelay=30 usbcore.autosuspend=120 usbcore.old_scheme_first=1 usbcore.initial_descriptor_timeout=60 usb-storage.delay_use=10 console=hvc0 console=tty0 earlyprintk=xen quiet splash nomdmonddf nomdmonisw ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 RfKill: Tags: xenial Uname: Linux 4.4.0-22-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-04-24 (30 days ago) UserGroups: adm cdrom dialout dip fax floppy fuse libvirtd lpadmin plugdev sambashare sudo tape video _MarkForUpload: True dmi.bios.date: 11/12/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1801 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: M5A78L-M/USB3 dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1801:bd11/12/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM5A78L-M/USB3:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1577018/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp