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DebianOn is an effort to document how to install, configure and use Debian on some specific hardware. Therefore potential buyers would know if that hardware is supported and owners would know how get the best out of that hardware. The purpose is not to duplicate the Debian Official Documentation, but to document how to install Debian on some specific hardware. If you need help to get Debian running on your hardware, please have a look at our user support channels where you may find specific channels (mailing list, IRC channel) dedicated to certain types of hardware. |
Translation(s): none
Contents
Models covered
Lenovo ThinkPad T420
4177, 14.0" (1600x900), Intel Core i7-2640M, 8GB, 256 GB SSD, Intel HD Graphics 3000, Intel Centrino Ultimate-N 6300, Bluetooth 3.0, DVD burner, SD card reader, modem, express card reader.
Overall Status
Core Components |
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Boot Standard Kernel: |
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LAN network card (Generic Ethernet): |
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Detect CD/DVD (Generic DVD+RW) : |
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Sound: |
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Detect hard drives: |
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Extra Features |
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CPU Frequency Scaling |
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Hibernation |
[?] |
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Sleep / Suspend |
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Xorg |
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- OpenGL |
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- Resize-and-Rotate(randr) |
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Switch to External Screen |
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Mouse |
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- Built-in (Trackpoint) |
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- Built-in (Touchpad) |
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Bluetooth |
[?] |
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Webcam |
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Wireless/Wifi |
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Keyboard's Hotkeys |
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Modem |
[?] |
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Express card reader |
[?] |
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SD card reader |
[?] |
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External dock |
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![[ATTACH]](/InstallingDebianOn/Thinkpad/T420/jessie?action=AttachFile&do=upload_form&ticket=0065150260.16d7e2c2bef7ecf0061ce1444f8a8a46818066bc&target=photo.png "[ATTACH]"){kind=small}
Legend :
= OK ; 
Unsupported(No Driver) ; ![/!\](/htdocs/debwiki/img/alert.png "/!\"){kind=small}
= Error (Couldn't get it working); [?] Unknown, Not Test ; [-] Not-applicable
= Configuration Required; 
= Only works with a non-free driver and or firmware
Configuration
Audio
The snd_hda_intel driver included in alsa-base works out of the box.
Dock audio
TODO
Power Management
Suspend-to-RAM works out of the box.
To prevent the laptop from suspending when the lid is closed, set the following in /etc/systemd/logind.conf:
HandleLidSwitch=lock
Putting the following kernel module options in /etc/modprobe.d/i915.conf has been suggested to reduce the power consumption of the GPU at rest:
options i915 i915_enable_rc6=7 i915_enable_fbc=1 lvds_downclock=1
laptop-mode-tools
If you use laptop-mode-tools, you will need the following in /etc/laptop-mode/conf.d/lcd-brightness.conf to configure the brightness of the screen:
BATT_BRIGHTNESS_COMMAND="echo 3000" LM_AC_BRIGHTNESS_COMMAND="cat /sys/class/backlight/intel_backlight/max_brightness" NOLM_AC_BRIGHTNESS_COMMAND="cat /sys/class/backlight/intel_backlight/max_brightness" BRIGHTNESS_OUTPUT="/sys/class/backlight/intel_backlight/brightness"
and the following in /etc/laptop-mode/conf.d/cpufreq.conf to use the correct CPU governors:
BATT_CPU_GOVERNOR=powersave LM_AC_CPU_GOVERNOR=performance NOLM_AC_CPU_GOVERNOR=performance
WiFi
Wireless did not work out-of-the box, but required installation of the non-free Debian package firmware-iwlwifi.
System Summary
lspci
lsusb
TODO
Resources
Attachments
Some configuration files and sample outputs.