We have a dozen of HP laptop here running ubuntu and xubuntu 14.04 and 14.10 and, since few months, all of them can't power off when we try to shutdown them. Indeed, after few seconds of an apparent power off, the laptops restart.
Please find attached, the dmesg result of one of them.
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ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: slafont 2100 F.... pulseaudio
/dev/snd/pcmC0D0p: slafont 2100 F...m pulseaudio
/dev/snd/timer: slafont 2100 f.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=d61ff2e7-d6d3-431a-823e-c1a06ff2da80
InstallationDate: Installed on 2014-01-16 (434 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: Hewlett-Packard HP EliteBook Folio 9470m
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-48-generic root=UUID=594fc36c-3a8e-4857-a07c-a7b89e44816a ro quiet splash acpi_backlight=vendor vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16
RelatedPackageVersions:
linux-restricted-modules-3.13.0-48-generic N/A
linux-backports-modules-3.13.0-48-generic N/A
linux-firmware 1.127.11
Tags: trusty
Uname: Linux 3.13.0-48-generic x86_64
UpgradeStatus: Upgraded to trusty on 2014-04-29 (331 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/08/2013
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68IBD Ver. F.47
dmi.board.name: 18DF
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 62.17
dmi.chassis.asset.tag: CNU3519KSP
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68IBDVer.F.47:bd10/08/2013:svnHewlett-Packard:pnHPEliteBookFolio9470m:pvrA1029D1102:rvnHewlett-Packard:rn18DF:rvrKBCVersion62.17:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook Folio 9470m
dmi.product.version: A1029D1102
dmi.sys.vendor: Hewlett-Packard
---
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ispa 2276 F.... pulseaudio
/dev/snd/controlC0: ispa 2276 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=631fb6ce-a603-46a8-b22e-ab7dad7cb247
InstallationDate: Installed on 2014-12-16 (139 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Hewlett-Packard HP EliteBook 840 G1
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-51-generic root=UUID=edbd9d75-ff8d-42f4-87e4-cb9e67f4717a ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-51.84-generic 3.13.11-ckt18
RelatedPackageVersions:
linux-restricted-modules-3.13.0-51-generic N/A
linux-backports-modules-3.13.0-51-generic N/A
linux-firmware 1.127.11
Tags: trusty
Uname: Linux 3.13.0-51-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio bluetooth cdrom dip fuse lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 03/24/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L71 Ver. 01.31
dmi.board.name: 198F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 15.56
dmi.chassis.asset.tag: 5CG4481ZCY
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL71Ver.01.31:bd03/24/2015:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.56:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 840 G1
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard
Another laptop dmesg