Ubuntu :: Won't Communicate Over USB - Port Only For Charging?
Oct 25, 2010
I have a wireless headset that I'm trying to charge through USB. When I connect it, it just doesn't charge. Looking at dmesg, the device isn't recognised, which is not surprising, since I think the USB port is only for charging, and it won't communicate over USB. lsusb also tells me that (apart from other things that are connected to the USB bus, that all of the 'MaxPower' variables are set to 0mA. So what I think is happening is I connect the headset ubuntu queries it, receives no reply, and so doesn't let the port draw any current. As far as I'm aware, there usually is some kind of OS handshaking like this, but it may vary from model of computer to model, so there's no point in saying "my <INSERT USB DEVICE HERE> charges". I am able to charge my MP3 player from the same port (because it's recognised), and I can charge the headset if I use a dumb mains->USB/5V transformer, but it should also work with my laptop. What I think I need is some way of manually setting the 'MaxPower' on the USB ports.
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May 31, 2011
I have a dual boot with Windows XP and Ubuntu 10.10. I connected my Amazon Kindle to an USB interface in XP and in Ubuntu. From XP everything works with no flaw. In Ubuntu the data exchange is perfect, but the device does not charge.
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Feb 15, 2010
I didn't know that charging via usb for my sony ericsson mobile, w880i actually needs the SE PC Suite to be installed, cos, I used to charge it via usb cable, as mentioned, on my workstation, which is window based, it's kinda insignificant to me that the software has to be installed first.
However, I'm currently on the move, with my newly installed "netbook", I installed Ubuntu 9.10 on my twinhead efio 121A (which is good, no compatibility issue) and now, I just figured that, SE PC Suite does not have any linux version, but my mobile is already out of battery, and I desperately need to charge it,
I did run a lsusb, it doesn't seem to detect the phone, neither as usb storage, or as a phone, cos, I saw other people lsusb output, it's an item with "sony ericsson", but my output does not have such item. However, when I plug in the usb cable, it did prompt to ask me to choose between "file transfer" or "phone mode".
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Jun 2, 2011
Can't get my battery to charge, it reads that it may be broken (about 20%).It reads that it is charged but when I go to details it reads charged but no watts.Also the time and menu commands at the top of the screen are not readable.they seem to be black on black text. This may be something stupid I have done...Toshiba Satellite pro L300 running natty
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Apr 4, 2010
Is there a way I can specify at what percentage i can make my battery to start charging? I guess the default it 95% which ends up wasting a lot of battery cycles.And my second question being can i have different modes like power saver,performance?
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Oct 20, 2010
I have a dell inspiron 2200 that has a pentium dual core and have been running Fedora 13 flawlessly I just noticed recently that my battery wasn't charging. It says battery fully charged at 0.0? And some days can't really recall it charges is there a way to fix this? I am running 2.6.34.7-56.fc13.i686
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Aug 9, 2011
I have a strange problem with the ACPI in my laptop, the problem start some days ago, I don't remember exactly the day.
The first symptom is with de Gnome Power Manager, only show me when I disconnect de AC power, but when connect it again the Power Manager icon disappear and the energy battery stay in the same value.
After search for a while, all the post I read talking about the /proc/acpi/battery directory, but this directory not exist on my laptop.
I have a laptop Lenovo G460. My OS is Squeeze. My Kernel is 2.6.38-bpo.2-amd64, because the 2.6.32 version of the kernel don't recognize well my audio card.
I can't attach the dmesg and the lsmod output because I receive a message "Sorry, the board attachment quota has been reached.", both file are compressed.
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Feb 18, 2010
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused
while
nc -v -w2 -z localhost BBBB
[code]....
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Feb 10, 2011
I have 2 computers one of them ubuntu installed and on the other one windows(xp) installed.how they can communicate?like file sharing,printer sharing etc.?wat kind software or what i need?
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Aug 30, 2010
I previously used SSH to communicate between my two ubuntu PCs, but my new internet connection is far too slow for this method. Is there someway I can directly communicate between my two PCs using the router. Samba? moreover, my ip seems to be dyanamic through my internet, how can i change it to static? or will it not matter for Local area connections?
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May 2, 2010
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
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Jul 18, 2010
I have two computers...Ubuntu server and Windows XP client. Both are connected to the internet using Ethernet. I have them connected directly using 1394 to increase speed of large transfers. The internet network and 1394 have different IP address scemes. Internet 192.168... 1394 10.0.0...
I am having problems getting the two computers to communicate with each other. I can ping the server's ip address and and it loops back. Same with the XP's IP address. I can't ping each other.
ifconfig shows my eth0 and eth1 connections are up. The eth1 Link Encap says UNSPEC.(Don't know if that means anything.)
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Dec 5, 2010
Chili555 where are you?
I am running Ubuntu Release 10.04 (lucid), Kernel Linux 2.6.32-26-generic-pae, GNOME 2.30.2.
I have installed the ASUS USB-N13 according to your advice in previous posts, specifically, in your advice to 828688 Ben.
The dongle seems to be operating as it should. The LED does its flashing at what appears to be the correct time. Wicd also looks correct. Networks are found with good signals shown. Everything looks correct. But when I attempt to connect, "validating authentication" runs for quite some time, and eventually results in a dialogue window stating the communication failed. The required WEP password is entered in the RT2870STA.dat file, and again in the wicd window.
I have entered as much detail in the RT2870STA.dat file as I dare, and believe it to be correct.
ndiswrapper is not installed. Network Manager is uninstalled. Only wicd remains.
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Jan 13, 2011
I am trying to communicate to a Sanyo projector using pySerial and am having issues. I have verified that my baudrate and parity are all set correctly. Here is my code (using COM13):
import serial
ser = serial.Serial(12)
ser.baudrate = 19200
[code].....
I have also tried variations using "CR0", "CR0", "CR0x0D" and nothing seems to change it. I'm using another application to ensure that I can speak to the Sanyo projector, and I get a correct response.CR0 is a status read of the hardware that should return something like "80" which would mean "STANDBY"However, the responses that I keep getting are things like 3,4, or 5 which seem to be errors, given that they are returned apparently based solely on the length of the String I send, not based on the actual command.
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Mar 2, 2010
getting back to our laptop, the stability window is ~3.2V. Meaning that when you operate the battery above this the electrolyte is oxidized on the positive electrode and reduced on the negative electrode. Remember that we only want to oxidize and reduce the active materials and don't want to do anything else. All these reactions other than the ones we want are called side reactions and these are really bad for the battery. The nominal voltage of a laptop battery is 3.7 V which means that something bad wants to happen as we use the battery.So long story short, stuff (e.g., passive layers and poor kinetics of reactions) happens and things are not as bad as they seem and you can increase the voltage up to 4.2V without bad things really happening. All chargers for Li-ion cells today cut the battery off when it reaches 4.2V. What you have to realize is that at 4.2V, these side reactions are present in finite amounts and start to chemically kill the battery, but its not that dramatic.
Operating to 4.1V makes things better and extends the life, 4.0 V is even better and so on. So why don't battery manufacturers cut the voltage off at, say, 4 V to get better battery life? Because every time you cut this voltage down you decrease the capacity of the battery and its run time. The 4.2V cutoff is a compromise between good run time and decent (read "not pathetic) life.On the other hand, if you charge the battery and then pull the plug (so to speak), the battery discharges some, the voltage drops, and these reactions become less of a problem and your battery life goes up. So the best things you can do is to charge the laptop (or cell phone, camera etc.) and once its charged, pull the plug. Your battery will thank you for it.As a matter of fact, if you own a Lenovo Thinkpad, you can actually change the state of charge to which you charge the battery using the Battery Maintenance utility. You can change this from charging to 100% state (where the voltage is 4.2V) to 90% so that your voltage is less. You lose some energy is doing that, but atleast you can change it to 100% when you need battery power and put it back down to 90% when you can plug in. I wish my Mac has the same feature.
I typically use the battery for a while (say 1/2 hour to 1 hour), then plug it in and wait to fully charge it, then I pull the plug and use it again for 1/2 hour to 1h and then I repeat this. Takes some getting used to and I forget to do this, but I try.
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Mar 28, 2011
I'm running Windows 7 Enterprise and noticed something new. The system icon for battery life is showing "plugged in, not charging." Does this oddity occur in Fedora too?
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Nov 19, 2010
How can I get two ip addresses to communicate with each other which are not in the same 255 range?
Like:
192.168.0.1
and
192.168.1.1
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Dec 3, 2010
I'm using Fedora 9 and has finished the DHCP for my eth2 and static on eth0. I would like to add a route so that the 192.168.22.x eth0 and 192.168.26.x eth2 can communicate to each others,.
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Oct 2, 2010
I am trying to set up a website from my ubuntu machine through IIS of windows server 2003. I am sharing the folder I want to store the files in across the network and all the computers are seeing it find.
The question is, how do I do this so it does not require a password to connect to it or give windows the permission without having to put them in every time.
I can get to my website, but it is asking for username and pass... I need that gone.
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Dec 18, 2010
I am testing with Suse Linux Enterprise Server 10 in a VMWare environment. I've installed two SLES10 servers, named sles1 and sles2. I can't get the two servers to communicate, even a simple ping won't work. The "Network Adapter" in VMWare is set to "bridged", a setting which has worked fine when installing WinXP in VMWare and connecting to the Internet.Even if I ping sles1 from sles1 (= "pinging myself"), I get the same error message.Only if I ping localhost, I get a proper ping result.What did I do wrong? Did I forget to configure something?
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Oct 12, 2010
I am setting up a small home print server running Fedora 13 (no gui). I setup Samba to have 1 file share and 1 printer. I can access both just fine in Windows network.
However when I try to print, nothing happens. I looked under Jobs in the Cups Web Interface and no job was ever created, so I suspect either Samba or CUPS isn't configured correctly. I am able to print a test page from CUPS directly.
smb.conf
Code:
Code:
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Apr 1, 2009
I'm trying to attach an fstream to serial port for reading and writing with the following code:
Code:
#include <iostream>
#include <fstream>
#include <string>
[code]....
The code compiles without errors, but doesn't catch any input text from the device attached to RS232. I have tried it with Rx and Tx connected, but didn't receive my text back. It works OK if I substitute /dev/ttyS0 with an ordinary file, but any attempt to use /dev/ttyS0 seems to lead to an empty answer string. I tried this on a PC under Ubuntu Linux 7.10.
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Feb 24, 2009
I have a application in C++, and now I have two class. MyDialog is the class that main function launch. In MyDialog class there are four elements and when I click over theese elements, there is a MousePressEvent that launch other class, Touchpad class. So, in some moments, I have loaded two class. My question is, how can pass a value from Touchpad class to MyDialog class, when I close (destroy) Touchpad class. In a few words, is it possible to communicate values between class?
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Aug 27, 2010
given my computer is in a network consisting of multiple subnetworks, i.e. there are groups of computers: {192.168.1.1, 192.168.1.2, 192.168.1.3 etc.}, {192.168.2.1, 192.168.2.2, 192.168.2.3 etc.},..., {192.168.254.1, 192.168.254.2, 192.168.254.3 etc.}. My computer is 192.168.1.1. So I can communicate with 192.168.1.2, 192.168.1.3 etc. To communicate with other people I have manually switch to the proper subnetwork and take a new ip, e.g. 192.168.2.1. My question is: Is there any way to be member of all groups and communicate simultaneously with ALL computers? And if not, is there a way to find out (without manually changing the ip address) if computers of other subnetworks are online, so one does not have to change the ip and then look for other computers in the new subnetwork?
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Aug 17, 2010
Trying to install Debian 5050i-386 ISO Image. Part way through I get the following error message: The network autoconfiguration was successful. However, no default route was set: the system does not know how to communicate with hosts on the Internet. This will make it impossible to continue with the installation unless you have the first official Debian CD-ROM, a 'Netinst' CD-ROM, or packages available on the local network. Of course I discontinued the install. How does one set a default rout?
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Oct 20, 2009
I downloaded and installed a new copy of Fedora 11 last week onto a new computer (hereafter "proximate"). I also have a remote computer without a monitor running an outdated version of Red Hat Linux (hereafter "remote"). To manage the processes on remote graphically, I ssh from proximate into remote; this connection succeeds without incident in transmitting text (including commands) between the two computers; however, the command "gnome-session" returns: (gnome-session:15789): Gtk-WARNING **: cannot open display:
(The numbers apparently represent the process identifier and vary from instance to instance.) A similar warning (and no accompanying graphics) occurs whenever I attempt to start any graphical user interface from remote via ssh from proximate. The issue almost certainly lies with proximate; remote successfully communicated graphics to the ancient box that proximate replaces.
Interestingly, I cannot communicate via ssh from remote to proximate (within a secure shell from proximate to remote). If I execute /usr/sbin/sshd on proximate as root, then I can login, but even then I cannot execute any commands.
Consider the following output:
If I execute ssh -vvv proximate from remote to proximate, then I get a lengthy output that ultimately ends with "debug1: Exit status 254."
What must I do to communicate both text and graphics among my computers?
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Apr 16, 2011
I am having trouble connecting to my Garmin GPS unit, an eTrex Venture HC. I gather from all the resources I've checked that it my system is finding the GPS just fine, but I am unable to communicate with the device. Using gpsbabel, I get the following error:
I noticed that the gpsd service was disabled, so I enabled it, but that didn't seem to change anything.
(using Fedora 14)
lsusb:
dmesg:
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Jan 26, 2009
After updates and restart of debian server, my NIS is not functioning. No yptools are working, it cannot find the server. All my commands I issue on the NIS server. When I issue the command yptest, I get:
>>
century4:~# yptest
Test 1: domainname
Configured domainname is "cga.lan"
Test 2: ypbind
Can't communicate with ypbind
century4:~#
<<
rpcinfo gives:
>>
century4:~# rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100004 2 udp 899 ypserv
100004 1 udp 899 ypserv
100004 2 tcp 902 ypserv
100004 1 tcp 902 ypserv
100009 1 udp 901 yppasswdd
600100069 1 udp 904 fypxfrd
600100069 1 tcp 906 fypxfrd
100007 2 udp 913 ypbind
100007 1 udp 913 ypbind
100007 2 tcp 916 ypbind
100007 1 tcp 916 ypbind
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100021 1 udp 32795 nlockmgr
100021 3 udp 32795 nlockmgr
100021 4 udp 32795 nlockmgr
100021 1 tcp 59990 nlockmgr
100021 3 tcp 59990 nlockmgr
100021 4 tcp 59990 nlockmgr
100005 1 udp 894 mountd
100005 1 tcp 897 mountd
100005 2 udp 894 mountd
100005 2 tcp 897 mountd
100005 3 udp 894 mountd
100005 3 tcp 897 mountd
100024 1 udp 32797 status
100024 1 tcp 59863 status
century4:~#
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Apr 6, 2010
I am trying to set up an NIS client on a Fedora Core 12 64-bit system. The ypbind daemon is running via the /etc/init.d/ypbind script. However, whenever I run the ypwhich command, the following error message appears on-screen:
[code]...
The client has been configured so the domain is set, and the client will broadcast for the first available nis server. The client is on a subnet where there is one nis slave server, so it should bind to that server. One thought that came to mind was the fact the client in question is 64-bit, while the nis slave is 32-bit. Could that cause this problem?
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May 21, 2010
I will be setting up Apache web server in DMZ and Oracle web server (Windows) in LAN. The requirement is to allow logged in visitors to view / change their details via the web site. What is the best way to configure this. Is simply allowing web server's ip to communicate with oracle server's ip (and the oracle port) is secure enough or is there a way to do this more securely?
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