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=== Linux Installation ===
=== Linux Installation ===
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{{WARN|Do not install Linux if you are using a BIOS version prior to 2.08! Depending on your BIOS settings this can [https://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/HOWTO-Brick-a-W540-in-easy-steps/td-p/1400393 break your mainboard].}}
As of 2014-02-124 the following problems exist with the W540 under opensuse 13.1 64bit Linux:
As of 2014-02-124 the following problems exist with the W540 under opensuse 13.1 64bit Linux:
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It is able to drive two external monitors and the internal display using the two side ports. The thunderbolt connector works correctly, including audio though the thunderbolt port via an HDMI adapter to a TV.
It is able to drive two external monitors and the internal display using the two side ports. The thunderbolt connector works correctly, including audio though the thunderbolt port via an HDMI adapter to a TV.
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There are more problems to work around on other machines; probably, the BIOS version is making the difference. When installing opensuse 13.1 (64 bit) on a machine with BIOS version 2.09, "OS Optimized Defaults" disabled in the BIOS setup, the following problems might occur:
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* Activating the NVIDIA GPU causes memory corruption leading to crashes and file system corruption. This might be related to [https://github.com/Bumblebee-Project/bbswitch/issues/78 this issue]. A workaround is using only intel graphics using the kernel options<br />{{bootparm|i915.modeset|1}} {{bootparm|nouveau.modeset|0}}<br /> and probably {{bootparm|rdblacklist|nouveau}} and blacklisting the nouveau module in {{path|/etc/modprobe.d}}.
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* Under unknown circumstances, the USB subsystem dies completely. This might be related to the integrated camera and power saving (using the "tunables" in powertop might also have provoked this behaviour). This does not seem to happen when using the kernel options<br />{{bootparm|acpi_osi|'!Windows 2012'}} {{bootparm|apm|off}} {{bootparm|powersaved|off}} {{bootparm|nohz|off}} {{bootparm|usbcore.autosuspend|-1}}<br />Probably, {{bootparm|nohz|off}} is sufficient.
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* The current kernel does not support the card reader. There's no known workaround besides using an external reader.
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* You might want to use the kernel option {{bootparm|acpi_osi|'!Windows 2012'}} for better working brightness keys.
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* To get the TrackPoint button emulation working, edit your {{path|/etc/X11/xorg.conf.d/50-synaptics.conf}} according to the answer to [http://askubuntu.com/questions/370505/how-to-use-trackpoint-but-keep-touchpad-disabled-on-lenovo-thinkpad-e531 this question].
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* The current kernel seems to have a problem recognizing some external USB drives.
[[Category:W Series]]
[[Category:W Series]]