Hi,I'm running fedora 21 on a Lenovo X140e laptop. Dmesg shows the following 
and a message says contact you at this email. Please have a look. Thanks!

[    9.041690] SELinux: initialized (dev nfsd, type nfsd), uses genfs_contexts
[   11.798179] acpi-cpufreq: overriding BIOS provided _PSD data
[   11.950990] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[   11.986475] ACPI Warning: SystemIO range 
0x0000000000000b00-0x0000000000000b07 conflicts with OpRegion 
0x0000000000000b00-0x0000000000000b0f (\_SB_.PCI0.SMB_.SMB0) 
(20140724/utaddress-258)
[   11.986492] ACPI: If an ACPI driver is available for this device, you should 
use it instead of the native driver
[   12.021664] wmi: Mapper loaded
[   12.151259] ACPI: Video Device [VGA] (multi-head: yes  rom: no  post: no)
[   12.151408] input: Video Bus as 
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input15
[   12.461314] MCE: In-kernel MCE decoding enabled.
[   12.461621] cfg80211: Calling CRDA to update world regulatory domain
[   12.697387] EDAC MC: Ver: 3.0.0
[   12.703680] thinkpad_acpi: ThinkPad ACPI Extras v0.25
[   12.703688] thinkpad_acpi: http://ibm-acpi.sf.net/
[   12.703691] thinkpad_acpi: ThinkPad BIOS GSET60WW (2.05 ), EC unknown
[   12.703695] thinkpad_acpi: Lenovo ThinkPad X140e, model 20BLS00400
[   12.704699] thinkpad_acpi: Unsupported brightness interface, please contact 
ibm-acpi-devel@lists.sourceforge.net
[   12.710394] thinkpad_acpi: radio switch found; radios are enabled
[   12.710418] thinkpad_acpi: possible tablet mode switch found; ThinkPad in 
laptop mode
[   12.710593] [Firmware Bug]: ACPI: No _BQC method, cannot determine initial 
brightness
[   12.710632] thinkpad_acpi: This ThinkPad has standard ACPI backlight 
brightness control, supported by the ACPI video driver
[   12.710635] thinkpad_acpi: Disabling thinkpad-acpi brightness events by 
default...
[   12.717644] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is 
unblocked
[   12.718758] thinkpad_acpi: Console audio control enabled, mode: monitor 
(read only)

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