This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1250027
Title:
Lenovo ThinkPad T420s fails to boot with discrete graphics
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Booting a ThinkPad T420s with discrete graphics enabled in the causes
a hang during the boot.
The hang happens somewhere during udev startup, I think.
As described in #1007138, adding pci=noacpi to the kernel command line
fixes the problem.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-13-generic 3.11.0-13.20
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: olli 1732 F.... pulseaudio
/dev/snd/controlC0: olli 1732 F.... pulseaudio
/dev/snd/pcmC0D0p: olli 1732 F...m pulseaudio
Date: Mon Nov 11 12:08:47 2013
HibernationDevice: RESUME=UUID=99eff1be-4759-4df7-99d6-a91a4cf999ce
InstallationDate: Installed on 2013-10-19 (22 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: LENOVO 4174PEG
MarkForUpload: True
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic
root=UUID=e773c67a-283e-4a5d-b1ab-6000e6926d63 ro quiet splash pci=noacpi
RelatedPackageVersions:
linux-restricted-modules-3.11.0-13-generic N/A
linux-backports-modules-3.11.0-13-generic N/A
linux-firmware 1.116
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/11/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8CET57WW (1.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4174PEG
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:bvr8CET57WW(1.37):bd04/11/2013:svnLENOVO:pn4174PEG:pvrThinkPadT420s:rvnLENOVO:rn4174PEG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4174PEG
dmi.product.version: ThinkPad T420s
dmi.sys.vendor: LENOVO
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