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Message #88815
[Bug 1386863] Re: Wireless does not reconnect after modprobe or sleep in Lenovo T440 Ubuntu 14.10, Realtek Semiconductor Co., Ltd. RTL8192EE PCIe Wireless Network Adapter
Mahsa Mohammadkhani, could you please test the latest upstream kernel available from the very top line at the top of the page (the release names are irrelevant for testing in your release) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.18-rc3
This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.
** Description changed:
- Hi,
+ After resuming from suspend via closing the lid, my wireless doesn't
+ work. It finds the wireless network and tries to reconnect but fails.
+ The only I can solve it now is by restarting. This happens with both my
+ home and university AP. I do not have any other problem with these APs
+ with my other laptop.
- I have installed Ubuntu 14.10 on my new laptop (64 bits) on Oct. 25 and
- I got my laptop on Oct. 24, 2014, but after running "modprobe -r
- r8192ee" command and "modprobe r8192ee", where "r8192ee" is the name of
- my wireless module, my wireless connection cannot reconnect to the
- internet, even though it finds the wireless networks and tries to
- reconnect but it fails. I actually notice this bug after my laptop went
- to sleep mode (by closing its lid) and then it was unable to reconnect
- to wireless again. The only I can solve it now is by restarting.
-
- I have tried it with AP at my home which the router is nearby and with
- AP at my university which is public. In both cases it happends. I do not
- have any other problem with these APs with the other laptop I have.
-
- The wireless hardware in my laptop (Lenovo T440) was not working at all
- in Ubuntu 14.04, I have teseted it in this week, and it was reported as
- a confirmed bug. I could not run "upstream's compat-wireless backports".
-
- Here are the details about it:
-
- uname -a ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Linux mahsa-ThinkPad-T440 3.16.0-23-generic #31-Ubuntu SMP Tue Oct 21 17:56:17 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
-
-
- lspci -vvxxx ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8192EE PCIe Wireless Network Adapter
- Subsystem: Realtek Semiconductor Co., Ltd. Device 001b
- Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort- <MAbort- >SERR- <PERR- INTx-
- Latency: 0, Cache Line Size: 64 bytes
- Interrupt: pin A routed to IRQ 64
- Region 0: I/O ports at 3000 [size=256]
- Region 2: Memory at f0400000 (64-bit, non-prefetchable) [size=16K]
- Capabilities: <access denied>
- Kernel driver in use: r8192ee
- 00: ec 10 8b 81 07 04 10 08 00 00 80 02 10 00 00 00
- 10: 01 30 00 00 00 00 00 00 04 00 40 f0 00 00 00 00
- 20: 00 00 00 00 00 00 00 00 00 00 00 00 ec 10 1b 00
- 30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00
-
-
- dmesg (After running modprobe -r r8192ee and modprobe r8192ee)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ I tried to re-initialize the kernel module but it doesn't work as per dmesg:
+ modprobe -r r8192ee && modprobe r8192ee
[ 125.586281] wlan0: deauthenticating from f4:7f:35:cc:f6:71 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 125.622205] cfg80211: Calling CRDA to update world regulatory domain
[ 125.630473] cfg80211: World regulatory domain updated:
[ 125.630476] cfg80211: DFS Master region: unset
[ 125.630478] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 125.630480] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630482] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630484] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630485] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630487] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.859714] cfg80211: Calling CRDA to update world regulatory domain
[ 138.872238] cfg80211: World regulatory domain updated:
[ 138.872240] cfg80211: DFS Master region: unset
[ 138.872241] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 138.872243] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872244] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872245] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872246] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872247] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.878321] r8192ee: module is from the staging directory, the quality is unknown, you have been warned.
[ 138.879407] mem mapped space: start: 0xf0400000 len:00004000 flags:00140204, after map:0xffffc90004ff8000
[ 138.879418] Pci Bridge Vendor is found index: 0
[ 138.879420] pcidev busnumber:devnumber:funcnumber:vendor:link_ctl 3:0:0:10ec:0
[ 138.879421] pci_bridge busnumber:devnumber:funcnumber:vendor:pcie_cap:link_ctl_reg:amd 0:28:1:8086:40:40:0
[ 138.879441] Boot from EFUSE
[ 138.886730] dev_addr: 38:b1:db:00:1b:9b
[ 138.886735] RT Customized ID: 0x12
[ 138.887501] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 138.887743] cfg80211: Calling CRDA for country: EC
[ 138.887777] rtlwifi: wireless switch is on
[ 138.888325] r8192ee 0000:03:00.0: irq 64 for MSI/MSI-X
[ 139.587122] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 139.587167] cfg80211: Regulatory domain changed to country: EC
[ 139.587169] cfg80211: DFS Master region: unset
[ 139.587170] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 139.587172] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 139.587173] cfg80211: (5170000 KHz - 5250000 KHz @ 20000 KHz), (300 mBi, 1700 mBm), (N/A)
[ 139.587175] cfg80211: (5250000 KHz - 5330000 KHz @ 20000 KHz), (300 mBi, 2300 mBm), (0 s)
[ 139.587175] cfg80211: (5735000 KHz - 5835000 KHz @ 20000 KHz), (300 mBi, 3000 mBm), (N/A)
[ 149.723735] wlan0: authenticate with f4:7f:35:dd:e1:c1
[ 150.390674] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 1/3)
[ 150.593636] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 2/3)
[ 150.797653] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 3/3)
[ 151.001675] wlan0: authentication with f4:7f:35:dd:e1:c1 timed out
[ 166.155577] wlan0: authenticate with f4:7f:35:f7:29:d1
[ 166.823724] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 1/3)
[ 167.027908] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 2/3)
[ 167.231945] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 3/3)
[ 167.435952] wlan0: authentication with f4:7f:35:f7:29:d1 timed out
[ 182.580710] wlan0: authenticate with f4:7f:35:f6:9e:d1
[ 183.248770] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 1/3)
[ 183.450239] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 2/3)
[ 183.654202] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 3/3)
[ 183.858252] wlan0: authentication with f4:7f:35:f6:9e:d1 timed out
[ 199.016228] wlan0: authenticate with f4:7f:35:cc:f6:71
[ 199.683511] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 1/3)
[ 199.884523] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 2/3)
[ 200.088554] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 3/3)
[ 200.292604] wlan0: authentication with f4:7f:35:cc:f6:71 timed out
- Thank you for your help.
- ---
+ ---
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: mahsa 2186 F.... pulseaudio
- /dev/snd/controlC1: mahsa 2186 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: mahsa 2186 F.... pulseaudio
+ /dev/snd/controlC1: mahsa 2186 F.... pulseaudio
CRDA:
- country EC: DFS-UNSET
- (2402 - 2482 @ 40), (N/A, 20)
- (5170 - 5250 @ 20), (3, 17)
- (5250 - 5330 @ 20), (3, 23), DFS
- (5735 - 5835 @ 20), (3, 30)
+ country EC: DFS-UNSET
+ (2402 - 2482 @ 40), (N/A, 20)
+ (5170 - 5250 @ 20), (3, 17)
+ (5250 - 5330 @ 20), (3, 23), DFS
+ (5735 - 5835 @ 20), (3, 30)
DistroRelease: Ubuntu 14.10
HibernationDevice: RESUME=UUID=ddd1312b-78c0-4393-949e-8507904afc64
InstallationDate: Installed on 2014-10-26 (13 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20B6CTO1WW
Package: linux (not installed)
ProcEnviron:
- LANGUAGE=en_CA:en
- TERM=xterm
- PATH=(custom, no user)
- LANG=en_CA.UTF-8
- SHELL=/bin/bash
+ LANGUAGE=en_CA:en
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=en_CA.UTF-8
+ SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=74eb8dd9-80ed-4d4b-bacd-d0c8e0749a36 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
PulseList:
- Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
- No PulseAudio daemon running, or not running as session daemon.
+ Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
+ No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
- linux-restricted-modules-3.16.0-24-generic N/A
- linux-backports-modules-3.16.0-24-generic N/A
- linux-firmware 1.138
+ linux-restricted-modules-3.16.0-24-generic N/A
+ linux-backports-modules-3.16.0-24-generic N/A
+ linux-firmware 1.138
StagingDrivers: r8192ee
Tags: utopic staging
Uname: Linux 3.16.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
-
+
_MarkForUpload: True
dmi.bios.date: 07/29/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET78WW (2.28 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20B6CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET78WW(2.28):bd07/29/2014:svnLENOVO:pn20B6CTO1WW:pvrThinkPadT440:rvnLENOVO:rn20B6CTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20B6CTO1WW
dmi.product.version: ThinkPad T440
dmi.sys.vendor: LENOVO
** Summary changed:
- Wireless does not reconnect after modprobe or sleep in Lenovo T440 Ubuntu 14.10, Realtek Semiconductor Co., Ltd. RTL8192EE PCIe Wireless Network Adapter
+ 10ec:818b [Lenovo ThinkPad T440] WiFi does not reconnect after resuming from sleep in Ubuntu 14.10
** Changed in: linux (Ubuntu)
Importance: Low => Medium
--
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/1386863
Title:
10ec:818b [Lenovo ThinkPad T440] WiFi does not reconnect after
resuming from sleep in Ubuntu 14.10
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After resuming from suspend via closing the lid, my wireless doesn't
work. It finds the wireless network and tries to reconnect but fails.
The only I can solve it now is by restarting. This happens with both
my home and university AP. I do not have any other problem with these
APs with my other laptop.
I tried to re-initialize the kernel module but it doesn't work as per dmesg:
modprobe -r r8192ee && modprobe r8192ee
[ 125.586281] wlan0: deauthenticating from f4:7f:35:cc:f6:71 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 125.622205] cfg80211: Calling CRDA to update world regulatory domain
[ 125.630473] cfg80211: World regulatory domain updated:
[ 125.630476] cfg80211: DFS Master region: unset
[ 125.630478] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 125.630480] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630482] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630484] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630485] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 125.630487] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.859714] cfg80211: Calling CRDA to update world regulatory domain
[ 138.872238] cfg80211: World regulatory domain updated:
[ 138.872240] cfg80211: DFS Master region: unset
[ 138.872241] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 138.872243] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872244] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872245] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872246] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.872247] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 138.878321] r8192ee: module is from the staging directory, the quality is unknown, you have been warned.
[ 138.879407] mem mapped space: start: 0xf0400000 len:00004000 flags:00140204, after map:0xffffc90004ff8000
[ 138.879418] Pci Bridge Vendor is found index: 0
[ 138.879420] pcidev busnumber:devnumber:funcnumber:vendor:link_ctl 3:0:0:10ec:0
[ 138.879421] pci_bridge busnumber:devnumber:funcnumber:vendor:pcie_cap:link_ctl_reg:amd 0:28:1:8086:40:40:0
[ 138.879441] Boot from EFUSE
[ 138.886730] dev_addr: 38:b1:db:00:1b:9b
[ 138.886735] RT Customized ID: 0x12
[ 138.887501] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 138.887743] cfg80211: Calling CRDA for country: EC
[ 138.887777] rtlwifi: wireless switch is on
[ 138.888325] r8192ee 0000:03:00.0: irq 64 for MSI/MSI-X
[ 139.587122] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 139.587167] cfg80211: Regulatory domain changed to country: EC
[ 139.587169] cfg80211: DFS Master region: unset
[ 139.587170] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 139.587172] cfg80211: (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 139.587173] cfg80211: (5170000 KHz - 5250000 KHz @ 20000 KHz), (300 mBi, 1700 mBm), (N/A)
[ 139.587175] cfg80211: (5250000 KHz - 5330000 KHz @ 20000 KHz), (300 mBi, 2300 mBm), (0 s)
[ 139.587175] cfg80211: (5735000 KHz - 5835000 KHz @ 20000 KHz), (300 mBi, 3000 mBm), (N/A)
[ 149.723735] wlan0: authenticate with f4:7f:35:dd:e1:c1
[ 150.390674] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 1/3)
[ 150.593636] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 2/3)
[ 150.797653] wlan0: direct probe to f4:7f:35:dd:e1:c1 (try 3/3)
[ 151.001675] wlan0: authentication with f4:7f:35:dd:e1:c1 timed out
[ 166.155577] wlan0: authenticate with f4:7f:35:f7:29:d1
[ 166.823724] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 1/3)
[ 167.027908] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 2/3)
[ 167.231945] wlan0: direct probe to f4:7f:35:f7:29:d1 (try 3/3)
[ 167.435952] wlan0: authentication with f4:7f:35:f7:29:d1 timed out
[ 182.580710] wlan0: authenticate with f4:7f:35:f6:9e:d1
[ 183.248770] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 1/3)
[ 183.450239] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 2/3)
[ 183.654202] wlan0: direct probe to f4:7f:35:f6:9e:d1 (try 3/3)
[ 183.858252] wlan0: authentication with f4:7f:35:f6:9e:d1 timed out
[ 199.016228] wlan0: authenticate with f4:7f:35:cc:f6:71
[ 199.683511] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 1/3)
[ 199.884523] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 2/3)
[ 200.088554] wlan0: direct probe to f4:7f:35:cc:f6:71 (try 3/3)
[ 200.292604] wlan0: authentication with f4:7f:35:cc:f6:71 timed out
---
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mahsa 2186 F.... pulseaudio
/dev/snd/controlC1: mahsa 2186 F.... pulseaudio
CRDA:
country EC: DFS-UNSET
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 20), (3, 17)
(5250 - 5330 @ 20), (3, 23), DFS
(5735 - 5835 @ 20), (3, 30)
DistroRelease: Ubuntu 14.10
HibernationDevice: RESUME=UUID=ddd1312b-78c0-4393-949e-8507904afc64
InstallationDate: Installed on 2014-10-26 (13 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20B6CTO1WW
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic.efi.signed root=UUID=74eb8dd9-80ed-4d4b-bacd-d0c8e0749a36 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.16.0-24-generic N/A
linux-backports-modules-3.16.0-24-generic N/A
linux-firmware 1.138
StagingDrivers: r8192ee
Tags: utopic staging
Uname: Linux 3.16.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 07/29/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET78WW (2.28 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20B6CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET78WW(2.28):bd07/29/2014:svnLENOVO:pn20B6CTO1WW:pvrThinkPadT440:rvnLENOVO:rn20B6CTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20B6CTO1WW
dmi.product.version: ThinkPad T440
dmi.sys.vendor: LENOVO
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References
