** Description changed: Boot error occurs in a 64-bit system and only when certain conditions are met: BIOS/UEFI Settings: - Config -> Display -> Graphics Device [Discrete Graphics] - -> OS Detection for NVIDIA Optimus [Disabled] - Security -> Virtualization -> VT-x enabled - -> VT-d enabled + Config -> Display -> Graphics Device [Discrete Graphics] + -> OS Detection for NVIDIA Optimus [Disabled] + Security -> Virtualization -> Intel(R) Virtualization Technology [Enabled] + -> Intel(R) VT-d Feature [Enabled] System hangs at boot time either after kernel log shows: [ 1.043982] ACPI: Video Device [VID1] (multi-head: yes rom: yes post: no) [ 1.047138] FUJITSU Extended Socket Network Device Driver - version 1.0 - Copyright (c) 2015 FUJITSU LIMITED or later after: [OK] Started Load/Save Screen Backlight Brightness of backlight:nv_backlight. The error occurs randomly (about 50% of all boot tries). The error has already been known for a long time (e.g. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999) and has never been fixed. It also occurs for older BIOS/UEFI versions and Ubuntu versions (e.g. 14.04) than shown in the report. Other related reports can be found here: https://bugzilla.kernel.org/show_bug.cgi?id=43054 https://bugzilla.kernel.org/show_bug.cgi?id=156341 https://bugzilla.opensuse.org/show_bug.cgi?id=1022443 https://ubuntuforums.org/showthread.php?t=2044699 https://binaryimpulse.com/2014/08/lenovo-thinkpad-w520-workaround-for-linux-freezing-issue-at-boot/ https://forums.lenovo.com/t5/Linux-Discussion/64-bit-Linux-W520-amp-nVidia/td-p/577789/page/2 A workaround for this issue is to add kernel parameter "nox2apic" to the GRUB_CMDLINE_LINUX_DEFAULT line. Another possible workaround (at least for the first hanging position is to use kernel parameters 'acpi_osi=! acpi_osi="!Windows 2009"' instead. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-77-generic 4.4.0-77.98 ProcVersionSignature: Ubuntu 4.4.0-77.98-generic 4.4.59 Uname: Linux 4.4.0-77-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: cbergler 2040 F.... pulseaudio - /dev/snd/controlC0: cbergler 2040 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC1: cbergler 2040 F.... pulseaudio + /dev/snd/controlC0: cbergler 2040 F.... pulseaudio CurrentDesktop: XFCE Date: Wed May 3 13:03:38 2017 HibernationDevice: RESUME=UUID=19c8581e-f65b-4382-a940-e82a48d9297f MachineType: LENOVO 42844AG ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-77-generic root=UUID=2f25428b-c54c-422e-be18-18233f17990d ro nox2apic RelatedPackageVersions: - linux-restricted-modules-4.4.0-77-generic N/A - linux-backports-modules-4.4.0-77-generic N/A - linux-firmware 1.157.8 + linux-restricted-modules-4.4.0-77-generic N/A + linux-backports-modules-4.4.0-77-generic N/A + linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/20/2016 dmi.bios.vendor: LENOVO dmi.bios.version: 8BET63WW (1.43 ) dmi.board.asset.tag: Not Available dmi.board.name: 42844AG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8BET63WW(1.43):bd10/20/2016:svnLENOVO:pn42844AG:pvrThinkPadW520:rvnLENOVO:rn42844AG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 42844AG dmi.product.version: ThinkPad W520 dmi.sys.vendor: LENOVO
** Description changed: Boot error occurs in a 64-bit system and only when certain conditions are met: BIOS/UEFI Settings: Config -> Display -> Graphics Device [Discrete Graphics] -> OS Detection for NVIDIA Optimus [Disabled] Security -> Virtualization -> Intel(R) Virtualization Technology [Enabled] -> Intel(R) VT-d Feature [Enabled] System hangs at boot time either after kernel log shows: [ 1.043982] ACPI: Video Device [VID1] (multi-head: yes rom: yes post: no) [ 1.047138] FUJITSU Extended Socket Network Device Driver - version 1.0 - Copyright (c) 2015 FUJITSU LIMITED or later after: [OK] Started Load/Save Screen Backlight Brightness of backlight:nv_backlight. The error occurs randomly (about 50% of all boot tries). The error has already been known for a long time (e.g. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999) and has never been fixed. It also occurs for older BIOS/UEFI versions and Ubuntu versions (e.g. 14.04) than shown in the report. Other related reports can be found here: https://bugzilla.kernel.org/show_bug.cgi?id=43054 https://bugzilla.kernel.org/show_bug.cgi?id=156341 https://bugzilla.opensuse.org/show_bug.cgi?id=1022443 https://ubuntuforums.org/showthread.php?t=2044699 https://binaryimpulse.com/2014/08/lenovo-thinkpad-w520-workaround-for-linux-freezing-issue-at-boot/ https://forums.lenovo.com/t5/Linux-Discussion/64-bit-Linux-W520-amp-nVidia/td-p/577789/page/2 A workaround for this issue is to add kernel parameter "nox2apic" to the GRUB_CMDLINE_LINUX_DEFAULT line. Another possible workaround (at least for the first hanging position is to use kernel parameters 'acpi_osi=! acpi_osi="!Windows 2009"' instead. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-77-generic 4.4.0-77.98 ProcVersionSignature: Ubuntu 4.4.0-77.98-generic 4.4.59 Uname: Linux 4.4.0-77-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND - /dev/snd/controlC1: cbergler 2040 F.... pulseaudio - /dev/snd/controlC0: cbergler 2040 F.... pulseaudio + /dev/snd/controlC1: <user> 2040 F.... pulseaudio + /dev/snd/controlC0: <user> 2040 F.... pulseaudio CurrentDesktop: XFCE Date: Wed May 3 13:03:38 2017 HibernationDevice: RESUME=UUID=19c8581e-f65b-4382-a940-e82a48d9297f MachineType: LENOVO 42844AG ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-77-generic root=UUID=2f25428b-c54c-422e-be18-18233f17990d ro nox2apic RelatedPackageVersions: linux-restricted-modules-4.4.0-77-generic N/A linux-backports-modules-4.4.0-77-generic N/A linux-firmware 1.157.8 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/20/2016 dmi.bios.vendor: LENOVO dmi.bios.version: 8BET63WW (1.43 ) dmi.board.asset.tag: Not Available dmi.board.name: 42844AG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8BET63WW(1.43):bd10/20/2016:svnLENOVO:pn42844AG:pvrThinkPadW520:rvnLENOVO:rn42844AG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 42844AG dmi.product.version: ThinkPad W520 dmi.sys.vendor: LENOVO -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1687910 Title: [Lenovo W520] Linux Freezing Issue At Boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1687910/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
