Hi I'm using biometric device ( EgisTec ES603 ),
When the windows wakes up from sleep it doesn't work ( It works just when I unplug and plug it from the USB.
In Device manager I am seeing EgisTec ES603 Swipe Fingerprint Sensor,
In it's properties I don't see Power Management to make it don't go to sleep when the computer goes to sleep.
What can I do to make the biometric device always awake ?
I appreciate any help
Thanks.
You can try to follow the same procedure as you might to make your mouse wake the computer.:
Click Start, type "Control Panel", look under Devices and Printers. If your device shows up, double-click it, click the Hardware tab, click Properties, click Change Settings, Click Power Management, and set the checkbox "Allow this device to wake the computer."
If your device doesn't show up or doesn't present the same dialogs, I'm not sure what else to try.
Related
My power button died on my phone. Or got less and less responsive. Last time I was lucky that trying a long time I managed to start up my phone. Since then I kept my phone on perpetually or restarting it if that was required. However, now my phone just suddenly turned off out of nowhere. I tried to turn it on again but had no luck. I had previously turned on USB debugging since I thought that was enough to turn it on from the pc if it ever got turned off. Now it seems that was not enough as it shows up as unauthorized in adb (I never tried actually connecting, very stupid on my part). Is there any hope for turning my device on through adb.
Phone: Nokia 7.1
There are some questions on problems with unauthorized devices (ADB Android Device Unauthorized) but those seem to assume I can still turn on my phone to change settings. Is it impossible otherwise?
tldr; Here is a detailed list of instructions if you want to try your luck with fastboot. Your touchscreen and volume buttons must be functional for this to work.
Make sure the phone is turned off.
Press and hold the Volume Down button. Don't release it.
Plug in a USB charging cable
When the screen turns on and shows a message saying "Download" or "Fastboot" mode, release the Volume Down button.
Charge your phone like this for 2 minutes, to make sure it has enough charge.
Move your phone's USB cable and connect it to a PC.
Download the binary for fastboot.
Run fastboot continue.
I've written a win32 App in C++ (a game) and I want to be able to know if the application has lost focus due to the user pressing CTRL-ALT-DEL and starting the task manager. How can I do this? What I want to do after detecting the event is to minimize the window of my game and pause its processing (animations, audio, etc.). However, if the user returns from the CTRL-ALT-DEL menu to the game then it should keep running as usual. I've thought that I could check for key presses on CTRL, ALT and DEL but that doesn't seem to work and just reacting to the lost the focus (WM_KILLFOCUS) is not what I want.
You can use WTSRegisterSessionNotification(), you'll get the WM_WTSSESSION_CHANGE message when the user presses Ctrl+Alt+Del and switches to the secure desktop.
Beware that you cannot tell that it was actually the secure desktop that he switched to, that would be rather nasty security leak. You'll also get the notification when he switches to another logon session. Also a case where you want to stop your game of course.
For that matter, a game ought to automatically pause whenever the game window loses the foreground. Nobody likes to be killed when they switch to their email reader :) Use the WM_ACTIVATEAPP message
Consider the below case:
A mobile phone is booted. At this moment it can be said that it is in run mode where the power consumption is more.
If no activity is done, after sometime the screen goes dim.
After further inactivity, the screen completely goes off.
Now my question is: can we say that the mobile phone was in standby mode and sleep mode in above steps 2 and 3 respectively?
Another question is, suppose we are playing some music and we leave the mobile like that for sometime. In this case also the mobile phone goes through 2 and 3 steps mentioned above. But the only difference to earlier scenario is that music is being played in the second scenario. In this case, can we say that mobile phone was in standby and sleep mode respectively in 2 & 3 steps when the music is being played.
If no activity is there for Linux, CPUIDLE threads gets scheduled by scheduler as it is the least priority process and it brings the CPU to various low power states, where as other peripheral are governed by various other concepts of OS.
If screen goes dim it can lead to two possibilities :
Partial wake load is help and system is down (some power save)
Linux suspend called (echo mem > /sys/power/stae) and full device is suspended, (huge power saves, as only ddr is active that to in self refreshing mode along with ALWAYS ON module)
So just by seeing you cant say its in sleep or suspend mode, but if say your touch or some activity other then register WAKE UP event brings the screen up, your device was in sleep mode not suspend mode.
WAKE UP events usually are "power on key", alarm, network packet (ie a call or message etc)
And for your second part of question, it belongs to low power audio concept, it varies alot with your device architecture.
Most common in android phones are putting the cpu in 'Low power state' and periodically waking them up to copy the music data to DMA, which can be played.
There are so many concepts used in the scenario you have used varies with OS and architecture and application, I have tried my best to give you a bird's eye view.
I am trying to write something for windows using WINAPI, so I can make the touch pad do whatever the mac touch pad do.
I have checked using Spy++ what WM messages the two finger taps and etc. send to the OS, but figured out it sends only those plus/minus:
WM_LBUTTONDOWN
WM_LBUTTONUP
WM_MOUSEHOVER
WM_MOUSEHWHEEL
WM_MOUSELEAVE
WM_MOUSEMOVE
WM_RBUTTONDOWN
WM_RBUTTONUP
When I tried to see what happend when clicking with 3 or 2 fingers it didn't send any particular message, unless I moved them a bit.
firstly i would like to start with this:
when 5 fingers going down show desktop (as win+D does).
How to write (driver?) something that can diagnose 5 fingers touching simultaneously the touch pad?
Of curse there is no OS messages for this, but I can make some unique combination of existed messages and by that diganose it.
If I need to write a driver can I do it generic for most of the touchpad, can I do it as add-on?
If you can post a good tutorial you are familiar with for writing a driver for windows, pls, cause I have no clue about it.
Do I need anything else to take into account :
1. Diagnose 5 fingers mouse events.
2. Make a thread in Explorer on startup that handle those new mouse messages.
thanks in advance
Mouse Input Notifications
In short, you can't.
First, there are touchpads that can physically detect only 1 finger touch, and for those who can detect many - their drivers do the translation for you.
Windows does not have any inherent support for reading multiple touch inputs - it relies on the touchpad drivers to provide them.
You can achieve your goal for SOME devices by writing your own touchpad driver (probably starting from Linux touchpad drivers and Windows driver development kit), but this is far from being simple.
And, you'll need to do this for each and every touchpad device you want to support (from Synaptics, Alps Electric, Cirque to name the few)
Only after that you can move on to implementing the reaction for the touchpad actions in applications like Explorer.
I have a WPF program that communicates with a specialized USB stick that is collecting data (in fact an ANT USB dongle). I noticed that the data collection simply stopped after a few hours. The reason was evident in the windows logs (system) where at the exact time the program stopped getting data, I see:
The system is entering sleep
Sleep Reason: System Idle
Questions
How do I programmatically prevent Windows from going to sleep so that I can continue to gather data?
2. Stepping backwards for the big picuture view... What's going on? Why does the computer going to sleep affect my program? Or is it just affecting the USB stick? Is it necessary to prevent sleep or should I do something else instead?
Einstein's answer is tantalizingly close. I just can't seem to get SetThreadExecutionState working in my C#/WPF program and can't find a lot of examples or discussions of it. Does it need to be called more than once? If so how? Is there a event that I receive that tell me to call it or should I call it every so often (5 minutes?) as suggested in:http://stackoverflow.com/questions/5870280/setthreadexecutionstate-is-not-working-when-called-from-windows-service
For now, I'm just going into ctrl panel -> power options and preventing sleep but it would sure be nice to have an elegant solution. Even on my own computer, I don't want to mess with the sleep settings. It's too hard to remember to set them back again!
You can prevent the computer from entering low power modes (sleep/suspend) by using the SetThreadExecutionState function.
As far as why going into low power mode is interrupting your data collection - well Windows suspends all processes in these modes and USB ports enter low power mode which likely means your USB device will not have power either. It's by design. After all, the whole reason we want our computers to go to sleep is so that the battery is not drained.
You can apply the above responses, o simply you can go in Control Panel -> Power Options and modify the settings, so your system never goes to sleep.
To 1): You can use SystemParametersInfo with one of the power related values on Windows versions less than Vista to turn on/off power savings settings. Starting with Vista, you should register for one of the power events instead, and the OS will notify you when it needs to for the event you request.
To 2): If the OS shuts down, the hardware it's managing shuts down. What else would you expect to happen? If the OS runs the USB device driver, which runs the USB device, what would you think would happen if the OS goes to sleep? The USB device begins running itself instead without the driver?