Public bug reported:
Random screen locking happens about once an hour. Mouse is not
responding, keyboard is, but GUI does not respond. To overcome the
problem I have to switch to terminal with ctrl+alt+1 and go back. In
dmesg I can see:
[ 68.509976] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510021] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510044] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510064] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510083] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510102] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510134] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510154] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.510644] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95)
[ 68.615945] vgaarb: this pci device is not a vga device
$ dmesg | grep vgaarb
[ 0.524324] vgaarb: setting as boot device: PCI:0000:00:02.0
[ 0.524325] vgaarb: device added:
PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[ 0.524328] vgaarb: loaded
[ 0.524329] vgaarb: bridge control possible 0000:00:02.0
[ 1.498735] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 5.667900] vgaarb: this pci device is not a vga device
[ 6.409112] vgaarb: this pci device is not a vga device
[ 68.506178] vgaarb: this pci device is not a vga device
[ 68.615945] vgaarb: this pci device is not a vga device
$ lspci
00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)
00:14.0 USB controller: Intel Corporation Lynx Point-LP USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation Lynx Point-LP HECI #0 (rev
04)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I218-LM (rev
04)
00:1b.0 Audio device: Intel Corporation Lynx Point-LP HD Audio Controller (rev
04)
00:1c.0 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 1
(rev e4)
00:1c.3 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 4
(rev e4)
00:1c.4 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 5
(rev e4)
00:1c.5 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 6
(rev e4)
00:1d.0 USB controller: Intel Corporation Lynx Point-LP USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Lynx Point-LP LPC Controller (rev 04)
00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller
[RAID mode] (rev 04)
00:1f.3 SMBus: Intel Corporation Lynx Point-LP SMBus Controller (rev 04)
01:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev
01)
02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
03:00.0 3D controller: NVIDIA Corporation GF117M [GeForce 610M/710M/820M / GT
620M/625M/630M/720M] (rev a1)
Dell Latitude E5540
SMBIOS 2.7 present.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: Dell Inc.
Version: A11
Release Date: 02/02/2015
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 14336 kB
Characteristics:
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
EDD is supported
5.25"/1.2 MB floppy services are supported (int 13h)
3.5"/720 kB floppy services are supported (int 13h)
3.5"/2.88 MB floppy services are supported (int 13h)
Print screen service is supported (int 5h)
8042 keyboard services are supported (int 9h)
Serial services are supported (int 14h)
Printer services are supported (int 17h)
ACPI is supported
USB legacy is supported
Smart battery is supported
BIOS boot specification is supported
Function key-initiated network boot is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 4.6
Handle 0xDEE1, DMI type 13, 22 bytes
BIOS Language Information
Language Description Format: Long
Installable Languages: 1
en|US|iso8859-1
Currently Installed Language: en|US|iso8859-1
$ lsb_release -rd
Description: Ubuntu 14.04.2 LTS
Release: 14.04
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-38-generic 3.16.0-38.52~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-38.52~14.04.1-generic 3.16.7-ckt10
Uname: Linux 3.16.0-38-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 1 09:28:38 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-05-28 (4 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-lts-utopic (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1460551
Title:
Random screen locking
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