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Ethernet Causes Mouse Problems

jreeve17

Hello, I have just purchased the Raspberry Pi Model B and have found a problem. Whenever I plug the Ethernet Cord in. The mouse (in x) drops to the bottom of the screen. Also, and keys i press become stuck and keep repeating untill I press another. Without the Ethernet cable, however the Pi works fine. I have tired reinstalling the  wheezy and different mice, but nothing works. The Keyboard also works fine, as I have been using it with my laptop with no problem.

I am using the Rasbian Wheezy with the GE Multimedia wireless keyboard and mouse.

How would I be able to fix or prevent this problem from happening?

Thanks in advance for any help you can give me.

 

Update: This problem is now happening even without the Ethernet cable plugged in. I have no idea why this is happening and still need help.

Parents

  • @ John Beetem I am pretty sure that this is not a power issue as I am using a USB wall plug outputing 5V 1A. Could this be too much power?

    Also, you mentioned that one of my chips or crystals could be bad. Would getting a new Pi help solve this problem?

  • in reply to jreeve17

    j reeve wrote:

     

    @ John Beetem I am pretty sure that this is not a power issue as I am using a USB wall plug outputing 5V 1A. Could this be too much power?

    Also, you mentioned that one of my chips or crystals could be bad. Would getting a new Pi help solve this problem?

    1A is not too much power.  5V at 1A means that the power supply can deliver up to 1A and is happy to deliver less current while maintaining 5V.

     

    The problem with RasPi power is that it has to go through a Micro USB cable and then through polyfuse F3 before it can be measured at TP1 and TP2.  Some micro USB cables have very thin conductors and you get a sizeable voltage drop.  Some F3 polyfuses are out of spec and cause an excessive voltage drop.  So if you have a multimeter or voltmeter, it's pretty easy to check that the voltage between TP1 and TP2 is 4.8V to 5.2V.  Iffy power can cause so many different symptoms that it's good to rule it out.

     

    If the LAN9512 chip or crystal is bad it's time for an RMA IMO.  Usually it's not the chip itself, but rather a bad solder joint, so some people who enjoy doing this sort of thing have reheated the X1 connections and made X1 work.  Everyone else should have the board replaced so that RasPi can improve the process.  I don't know how common the X1 problem is nowadays -- it was pretty rare even when RasPi was first being shipped.

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  • in reply to jreeve17

    j reeve wrote:

     

    @ John Beetem I am pretty sure that this is not a power issue as I am using a USB wall plug outputing 5V 1A. Could this be too much power?

    Also, you mentioned that one of my chips or crystals could be bad. Would getting a new Pi help solve this problem?

    1A is not too much power.  5V at 1A means that the power supply can deliver up to 1A and is happy to deliver less current while maintaining 5V.

     

    The problem with RasPi power is that it has to go through a Micro USB cable and then through polyfuse F3 before it can be measured at TP1 and TP2.  Some micro USB cables have very thin conductors and you get a sizeable voltage drop.  Some F3 polyfuses are out of spec and cause an excessive voltage drop.  So if you have a multimeter or voltmeter, it's pretty easy to check that the voltage between TP1 and TP2 is 4.8V to 5.2V.  Iffy power can cause so many different symptoms that it's good to rule it out.

     

    If the LAN9512 chip or crystal is bad it's time for an RMA IMO.  Usually it's not the chip itself, but rather a bad solder joint, so some people who enjoy doing this sort of thing have reheated the X1 connections and made X1 work.  Everyone else should have the board replaced so that RasPi can improve the process.  I don't know how common the X1 problem is nowadays -- it was pretty rare even when RasPi was first being shipped.

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