5/30/2023 0 Comments Startx not working raspberry pi![]() ![]() TL DR is that most HDMI cables don't actually include all 19 wires, which leads the Lapdock to think your device is disconnected. This is because it has some eccentricities with how it handles HDMI (see: ). Note that most HDMI cables won't work reliably with the Lapdock. Finally, here are some links to other people's experiences with hooking up an Atrix lapdock to the Raspberry Pi. Note that because the HDMI plug on this model is at a different angle from the Atrix lapdock, an micro-HDMI cable with protruding metal jack gives the best connection (see picture). ![]() On balance, though, it's quite usable, especially considering that this baby is available (used) on eBay for $35 - $40, with shipping included. The HDMI and USB plugs in the back of the Droid lapdock are rotated 180 degrees from the ones on Atrix lapdock, but that makes no difference when hooking up a Raspberry Pi. The Motorola Droid Bionic lapdock works just about as well as the original Atrix lapdock. After that, you'll be able to set an automatic boot to X Windows. Note that on your first boot you may have to type startx on the console command line. And, look! We're getting the bootup messages scrolling on the screen. What's happening? The power and activity LEDs on the Pi board have lit up. Let's carefully plug the full-sized male end of the HDMI cable into the Pi's HDMI jack. At this point, you may get a no-signal message on the lapdock screen. So, we will at this point attach the micro-female-to-micro-female HDMI adapter (with micro-male end of the HDMI cable inserted) to the lapdock's micro-male HDMI jack. the lapdock needs to sense a signal source attached to its HDMI jack in order to supply power through its USB bus. The Pi will not yet power up from the lapdock because. Now, hook up the USB cable, with appropriate adapter if necessary, as previously discussed. The display will be dark, since there is no signal coming in yet. If the battery has been charged, then this is optional. Power up the lapdock by plugging in its supplied AC adapter. The simplest is to just plug a power cable into the micro-USB power port on the Pi, as usual. Owners of earlier model Pis have a couple of options for power. This mean that the Pi can get its power from the lapdock, through the same USB cable previously discussed. 2.0, omits the fuses on the USB bus, so the Pi can be powered from one or the other of the USB ports. Finally, there's the issue of powering the Raspberry Pi. The full-size male end of the cable plugs into the HDMI jack on the Raspberry Pi. Our HDMI cable has a micro-male plug on one end, and this goes into the micro-female HDMI adapter on the lapdock. The A-male end plugs into one of the Pi's full-size USB jacks. Since the cable terminates in a female jack, we'll need either an A-male to A-male USB adapter or an A-male to A-male USB cable. The USB cable connects to one of the USB jacks on the Raspberry Pi. Note that it may be necessary to shave a bit off the micro-female end of the USB cable if it doesn't go down far enough over the male jack on the lapdock (refer to pictures). The micro-female end of the USB cable slips over the end of the micro-USB jack on the lapdock. The micro-HDMI adapter (or the dongle, if you're using that instead) slips over the end of the micro-HDMI jack on the lapdock. ![]() Open up the the narrow panel on the back of the lapdock and take a good look at the two jacks protruding from it. In this Instructable I will break down the process in detail, with appropriate explanation and close-up pictures. ![]() Yes, it can indeed be done! See for example. If we could just find the correct cables and adapters, we might be able to hook up our Raspberry Pi. Fortunately for us, the lapdock's USB and HDMI ports are electrically standard, even if the physical connectors aren't. These neatly mate with an Atrix phone, slipping right into appropriately positioned jacks on the side of the phone. The lapdock has two plugs on a foldout hinge - a male micro-HDMI plug and a male micro-USB-A plug. The Atrix Lapdock was manufactured to mechanically connect with the now-discontinued Motorola Atrix smartphone, in effect turning it into a laptop computer. The lapdock incorporates a razor-sharp 11" HDMI display, an almost-adequate keyboard-with-trackpad, twin speakers, and a high-capacity battery - all in a thin two-pound package. But, for about $75 (or even as low as $40, used, on eBay) you can get a discontinued model of the notorious Motorola Atrix Lapdock, the one that sold for $500 a couple of years back, and it was a bargain at that price. Unfortunately, they're expensive, running from $150 on up into the thousands for the huge ones. Teensy analog monitors are pretty cheap, but what you really want is a decent HDMI display. Now that you have your nifty new Raspberry Pi, you'll need a display for it. ![]()
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