73 lines
3.1 KiB
Markdown
73 lines
3.1 KiB
Markdown
## Dell Latitude E5*50 Linux support
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Tested on a Dell Latitude E5450 (late 2014) with Fedora 23/24 64bit, BIOS A10-A13.
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Please note: BIOS prior to A06 have a serious issue with de-bouncing/repeating keys under Linux, see http://en.community.dell.com/support-forums/laptop/f/3518/t/19593360. Updating to [A10](http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=DHD06&fileId=3469377694&osCode=W764&productCode=latitude-e5450-laptop&languageCode=EN&categoryId=BI) or higher is strongly reccomended.
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### Shutdown/reboot issues with kernel >= 4.8
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See [kernel/README.md](kernel/README.md)
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### WWAN module
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Dell Latitude E5*50 laptops could have a "Dell Wireless 5809e Gobi™ 4G LTE Mobile Broadband Card" WWAN module installed. This WWAN device is based on the Qualcomm Gobi™.
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| Name | Dell Wireless 5809e Gobi™ 4G LTE Mobile Broadband Card |
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| ID | 413c:81b1 |
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| Kernel module | qcserial, qmi_wwan |
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The device id of this Gobi™ module is still missing from the ```qcserial``` devices table, so I created a udev rule which loads the ```qcserial``` module, switchs the ```bConfigurationValue``` from 2 to 1** and adds the new device id ```413c:81b1``` to the ```qcserial``` driver. Current version of the udev rule loads the ```qmi_wwan``` modules too and adds the device id to that module to allow 4G/LTE connection through modern versions of NetworkManager/ModemManager.
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** By default the device is loaded in the ```cdc_mbim``` mode (see https://www.kernel.org/doc/Documentation/networking/cdc_mbim.txt) instead in the classic serial modem mode.
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#### GPS ####
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To start the GPS
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```bash
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echo "\$GPS_START" > /dev/ttyUSB0
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```
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To stop the GPS
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```bash
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echo "\$GPS_STOP" > /dev/ttyUSB0
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```
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In the ```bin``` folder you can find an utility (```gobigps```) to easily start and stop the GPS. To be able to use this utility as normal user (more in general, to use the GPS) the user must be member of the ```dialout``` group.
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You can check if the GPS is running with a simple ```cat```
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```bash
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cat /dev/ttyUSB0
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```
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or using _QGIS_.
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### Smart-card reader (Fedora <= 22 only)
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NOTE: this is not needed anymore, starting from Fedora 23 `pcsc-lite-ccid-1.4.19` is part of the stable release.
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The Broadcom 5880v5 used in this Latitude (id `0a5c:5804`) is supported by `pcsc-lite-ccid` starting from release 1.4.19. Fedora 21 and 22 provide version 1.4.18; `pcsc-lite-ccid-1.4.19`, backported from rawhide, can be downloaded from the following repo:
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https://copr.fedoraproject.org/coprs/dani/ccid-drivers-backport/
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Using DNF:
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```bash
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sudo dnf copr enable dani/ccid-drivers-backport
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sudo dnf install pcsc-lite-ccid
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```
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Using YUM:
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```bash
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wget -O- https://copr.fedoraproject.org/coprs/dani/ccid-drivers-backport/repo/fedora-21/dani-ccid-drivers-backport-fedora-21.repo | sudo tee /etc/yum.repos.d/dani-ccid-drivers-backport-fedora-21.repo
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sudo yum install pcsc-lite-ccid
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```
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## Related links
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- http://www.0xf8.org/2015/06/dell-wireless-5809e-support-in-opensuse-13-2/
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- http://www.0xf8.org/2015/07/dell-wireless-5809e-support-in-linux-a-followup/
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- https://sigquit.wordpress.com/2015/02/09/dell-branded-sierra-wireless-3g4g-modem-not-online/
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