Results 1 to 10 of 10
  1. #1
    4 Star Lounger
    Join Date
    Aug 2003
    Location
    Stroud, United Kingdom
    Posts
    548
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Bluetooth Permanently Disabled (XP Pro)

    Hi, is there a way in which you can permanently disable the Bluetooth Connection from being visbale in Device Manager?

    I ask because I want to ENABLE it.

    The Bluetooth module is physically present, is detectable and enabled in the BIOS, but in Windows, even though the Bluetooth Applet is in the control panel, it is not visible in Device Manager. Or in Network connections.

    When i try to enable bluetooth via the applet, it does nothing. I suspect that it has been somehow 'overridden',

    I have trawled throguh the registry but found nothing obvious. Any thoughts anyone?
    Thanks,

    pmatz

  2. #2
    Plutonium Lounger
    Join Date
    Nov 2001
    Posts
    10,550
    Thanks
    0
    Thanked 7 Times in 7 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Silly question, have you installed the vendor supplied drivers and support software for the specific device?

    StuartR

  3. #3
    4 Star Lounger
    Join Date
    Aug 2003
    Location
    Stroud, United Kingdom
    Posts
    548
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Hi,

    they are already installed. The Toshiba Bluetooth stack. The thing is it is not present in Device Manager. Even if drivers werent installed, I would get a 'unidentified device' in the device manager.

    Its like its been installed then somehow hidden / disabled <img src=/S/confused.gif border=0 alt=confused width=15 height=20>
    Thanks,

    pmatz

  4. #4
    Administrator
    Join Date
    Mar 2001
    Location
    St Louis, Missouri, USA
    Posts
    23,580
    Thanks
    5
    Thanked 1,057 Times in 926 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    If this is a USB device, is it plugged in? USB devices are hidden in device manager if they are not powered on or attached.

    Joe
    Joe

  5. #5
    Silver Lounger
    Join Date
    Oct 2002
    Posts
    1,993
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    I don't know so much about Bluetooth devices in combination with Windows.

    Sometimes when installing a device the install can get wrong, resulting in a "ghost device". One way to troubleshoot them can be to remove them and start over with the install of the device.

    You can if you like take a look at the Device Manager with the variable "devmgr_show_nonpresent_devices" set to 1, to see if you find anything odd. See my <post#=475,091>post 475,091</post#>

    There are of course many types of devices that is not always connected to the PC, USB etc. They also show up as ghost devices, or more exactly devices not present. In this case the stored information about the device makes Windows recognize it when the device is connected.

  6. #6
    4 Star Lounger
    Join Date
    Aug 2003
    Location
    Stroud, United Kingdom
    Posts
    548
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Yes, thats it. I found that by using the "devmgr_show_nonpresent_devices" set to 1, and starting the Device Manager from the Command prompt, then showing hidden devices, that the bluetooth devices were hidden and ghosts... this has been done somehow (which I quite interested in how thats done! and how its UNDONE!) to prevent the bluetooth being used - a security procedure no doubt.

    So anyhow, while the device manager was open with these showing, I ran the driver install, which picked up the devices, and gave me a fully functional bluetooth stack at last!

    The devices are still ghosted and hidden however!

    Thanks
    Thanks,

    pmatz

  7. #7
    Silver Lounger
    Join Date
    Oct 2002
    Posts
    1,993
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Hi,
    Yep, if one want to update a driver for a device it's a lot easier if one can pick the device one want updated <img src=/S/smile.gif border=0 alt=smile width=15 height=15>

    The tweaking of the Device Manager can be useful, but I don't think it is anything special involved in hiding the devices. That is, it isn't done in any special way, it is how Windows works.

    I think you know that to show non-Plug and Play devices you open Device Manager and then chose View, Show Hidden Devices.

    In normal view, by default, Device Manager shows installed and connected devices (Plug and Play; you have to chose hidden to show non-Plug and Play).

    When it comes to previously installed not present, i.e. not connected, you have to set it to show "nonpresent" via variable, then "Show Hidden". I have no explanation for this last step, chose "Show Hidden", in this case, but it seems logical to assume that it is not because someone, or something did hide it, but because default view of the Device Manager is installed and connected devices only; it gets sorted together with non-Plug and Play devices.

    As an example, when an USB flash memory is connected for the first time, information about the device is stored in the registry and can be shown in the Device Manager. When the USB memory is removed it disappears from the Device Manager in default view. The information is still there, and Windows recognizes the device when it is re-connected. The device moves from being "nonpresent" to present, connected. I would not call that a true ghosted entry, it's nonpresent.

    With USB it's obvious, people plug and un-plug, but in Win2000/XP if you have a modem connected to a COM-port and it's not turned on during boot it will not be available, with the "varaible-tweak" DM shows it as not present. Example: External Modem Not Available If It Is Not Present During Startup

    When it comes to NIC's, video cards etc. which one normally only has one, then after removing/upgrading one can talk about ghosts if they are left and interfere.

    As to how it's undone, if you want DM to always show "nonpresent" together with present, you can set the environment variable globally, see my other post.

    How is the bluetooth thingy connected? When installed and connected properly and enabled it should show up in normal view, I would guess.

  8. #8
    4 Star Lounger
    Join Date
    Aug 2003
    Location
    Stroud, United Kingdom
    Posts
    548
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Hi Argus,

    Thanks for your reply. Very interesting as I have never before needed to go to Show Hidden Devices in DM, was unaware of the presence of Ghosted Entries.

    The blue tooth is connected internally, the module is in the laptop. In the Bios you can enable or disbale this device. It is enabled.

    Somehow I think the image used in windows for our company has disabled the bluetooth in Windows by removing a driver or somehow making the device unavaible. It wasnt until i opened DM with ghosted entries and hidden devices that I could see the bluetooth stack, and then when i ran the driver install .exe it picked it up and installed the drivers. Before I opened DM in this mode, the install .exe said that no hardware was found!

    Still now though, in DM, there is nothing shown unless i choose view hidden devices.

    I have noticed in the registry that there are more than 1 controlset entry, and that some of these have the bluetooth listed. The currentcontrolset entry however, does not - I am guessing this is why the DM doesnt show it without the hidden devices showing!

    Cheers

    Paul
    Thanks,

    pmatz

  9. #9
    Silver Lounger
    Join Date
    Oct 2002
    Posts
    1,993
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Hi Paul,

    Is it working? Are you sure that it has a Bluetooth device inside? Apparently Toshiba may add Bluetooth tools etc. to every laptop even if there is no hardware to support it. What do you see in Device Manager > System devices? See: Toshiba M200 - Bluetooth Question (at Tablet PC Questions)

    To check (at Toshiba Europe Bluetooth Information Center): TOSHIBA internal Bluetooth module - General Information

    From there you can go here to see if Bluetooth hardware is present. Check stickers on the back of the laptop etc. TOSHIBA Bluetooth FAQ - Why is Bluetooth not working?

    I am sure you know every angle of this laptop, but have to ask: is there any button on the outside to control the Bluetooth connection?

    If Windows recognize the presence of a device (i.e. connected or enabled) it should show it in the Device Manager Default View in some way, with a question mark if no drivers etc.

    What do you see in the Control Panel, is there an item called Bluetooth Devices (i.e. bthprops.cpl)? You should also see a Bluetooth icon in the tray (Notification area, whatever). Do you see anything change when you use a Bluetooth device; phone, PDA etc?

    If it was me, I would not be satisfied if it did not show up in DM Default View. As I mentioned before, devices that are removed can only be viewed when the "nonpresent-variable" is used. In your case the integrated device cannot be removed, but it can be enabled/disabled in BIOS. I am thinking of a scenario how this could have been done:

    At some point someone enabled Bluetooth in BIOS. Eventually they had to add specific drivers. If later on, the drivers are uninstalled and Bluetooth is disabled in BIOS, the device disappears from DM. If one now uses the "nonpresent-variable" it would show up in DM as nonpresent. But in your case Bluetooth is enabled in BIOS, so even if it indeed was disabled and uninstalled drivers before, if enabled it should show up in DM. And if it needed drivers, as you mentioned, it would have a question mark (or MS drivers would install).

    As I mentioned in my first post; "One way to troubleshoot them can be to remove them and start over with the install of the device." Remove and do a search for new hardware, or remove and reboot and let Windows recognize it at boot time, that is what I would try.

    In XP SP2 they added built-in support for a range of devices. If supported one only have to connect it, in your case that would be: enable it in BIOS. If no support use manufacturer drivers.
    List of Bluetooth radio drivers that are included in Windows XP SP2

    How to install and configure Bluetooth devices in Windows XP Service Pack 2

    How to troubleshoot Bluetooth detection and connectivity problems in Windows XP Service Pack 2

  10. #10
    4 Star Lounger
    Join Date
    Aug 2003
    Location
    Stroud, United Kingdom
    Posts
    548
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Bluetooth Permanently Disabled (XP Pro)

    Hi

    It is working fine, just not showing in DM. I will carry on investigation as time permits [img]/forums/images/smilies/wink.gif[/img]

    Cheers
    Thanks,

    pmatz

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •