Microsoft Lumia 640 (microsoft-dempsey)
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![]() Dempsey running sxmo on postmarketOS | |
Manufacturer | Microsoft |
---|---|
Name | Lumia 640 |
Codename | microsoft-dempsey |
Released | 2015 |
Category | testing |
Original software | Windows Phone |
Original version | 8.1 |
Hardware | |
Chipset | Qualcomm Snapdragon 400 (MSM8926) |
CPU | Quad-core 1.2 GHz Cortex-A7 |
GPU | Adreno 305 |
Display | 720 x 1280 IPS LCD |
Storage | 8 GB |
Memory | 1 GB |
Architecture | armv7 |
USB Networking | |
---|---|
Flashing | |
Touchscreen |
Works |
Display |
Works |
WiFi |
Broken |
FDE |
Broken |
Mainline |
Works |
Battery |
Broken |
3D Acceleration |
Broken |
Audio |
Broken |
Bluetooth |
Broken |
Camera |
Broken |
GPS |
Broken |
Mobile data |
Broken |
SMS |
Broken |
Calls |
Broken |
USB OTG | |
NFC |
Works |
Accelerometer |
Works |
---|---|
Magnetometer | |
Ambient Light | |
Proximity | |
Hall Effect | |
Barometer | |
Power Sensor | |
Keyboard | |
---|---|
Touchpad | |
USB-A | |
HDMI/DP | |
Ir TX | |
FOSS bootloader | |
This device is a Windows Phone. See the Windows Phone page for common tips, guides and troubleshooting steps |
Contributors
Users owning this device
- Chaosleo07 (Notes: running mainline)
- FieryFlames (Notes: Single SIM, UK variant)
- Maxnet (Notes: rm-1077)
- Nobodywasishere (Notes: Actually the AT&T LTE model but close enough)
- PEPSIMANTR (Notes: Single SIM LTE variant(RM-1074))
- Ralf1307 (Notes: trying to port edk2 for efiframebuffer via mainline; broke the serial :()
- Rom4nik (Notes: RM-1077)
Current porting status
- Mainline boots and has touch, screen, and side keys working.
- All 4 cores are now up!
- NFC available!
- USB is currently being tested, I can't personally confirm if USB networking is working but someone with a Lumia 735 said it is for them.
- Proximity is working on tesla, just needs testing on dempsey
- WLAN & BT being looked at
Guides (Should work in theory for the other Lumia's specified in the EDK2 port as well.)
Here's a nice guide written by WolfLink115 which explains how to compile/install EDK2 and boot Linux:
- [1] Compiling EDK2
- [2] Installing EDK2
- [3] Booting Linux from eMMC
- [4] If you manage to brick the Lumia 640 (the RM-1073 version, not tested on others!!) into Qualcomm EDL mode, then this guide can help you unbrick it.
See also
Internal links
External links
- [5] Close to mainline linux kernel w/ support for dempsey and a few other msm8x26 lumias on msm8x26 branch. Use msm8x26-touchscreen branch for touchscreen, until it gets committed into msm8x26.
- [6] EDK2 for dempsey, tesla, makepeace and superman. This does boot Linux!
- [7] LittleKernel for tesla and some other lumias. This does not boot Linux!! Useful for chain loading lk2nd to dump regulators when porting a lumia to linux.
- [8] Boot shim used to boot EDK2.