Black screen while trying to disconnect from Bluetooth DUN connection

[Muhammet Aklan]

Hello.

The release of Ubuntu I am using: Ubuntu 13.04
The version of the package I am using: 0.9.8.0-0ubuntu6

I am using a Dell Inspiron 5520 laptop. And in order to connect to the Internet, I use my Samsung SGH-L700 phone as a Bluetooth modem. When I try to connect to the Internet via Bluetooth DUN connection using Network Manager applet, there is usually no problem. But when I try to disconnect,

What I expect to happen: The connection should be terminated and the system should go on working normally.

What happens instead: Suddenly, a black screen with full of text comes up. Sometimes (not always) a "panic occurred" message with a blinking Caps Lock light can be seen.

Additionally, after establishing the connection, the name of the connection isn't viewed on the applet's drop-down menu as it should be. Sometimes there is a strange character, sometimes the text "Empty tag", sometimes a text that is not about the connection's name such as "org.freedesktop. ..." or "Connect to a Wi-Fi _network" is seen instead of the name.

Before reporting this bug, I opened a topic on Ubuntu Turkey Forum. A forum moderator recommended me to file a bug report about network-manager package on Launchpad. So I filed a report here. This is my first bug report.

Thanks for possible solutions in advance.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: network-manager 0.9.8.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.2
Architecture: amd64
Date: Sun Jul 7 08:47:25 2013
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-04-25 (72 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
IpRoute:
 default via 192.200.1.21 dev ppp0 proto static
 169.254.0.0/16 dev ppp0 scope link metric 1000
 192.200.1.21 dev ppp0 proto kernel scope link src 176.54.117.54
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH
 Eternet bağlantısı 1 da70e189-6c65-4d1f-b53b-f5fe2792a95b 802-3-ethernet 0 never yes no /org/freedesktop/NetworkManager/Settings/5
 Vodafone Vodafone Internet 1 4e078a89-af38-40da-b417-5c63112ae40e gsm 1372265420 Çrş 26 Haz 2013 19:50:20 EEST no no /org/freedesktop/NetworkManager/Settings/4
 Vodafone Vodafone Internet 49a681ee-a7f1-44e1-a73a-1f6a39bce5c9 bluetooth 1373175856 Paz 07 Tem 2013 08:44:16 EEST no no /org/freedesktop/NetworkManager/Settings/3
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 C8:7E:75:0A:BF:14 bluetooth connected /org/freedesktop/NetworkManager/Devices/2
 wlan0 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.8.0 connected enabled enabled enabled enabled disabled

[Deepankar Singh (deepankar20-02)]

i also have the same problem. what i do to get over it is, i simply switch off the bluetooth of my mobile, i see the notification, "you are now offline", and then everything is normal

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[nitto (nitto)]

Same apparent problem on a Samsung NP270.
The error report is a long list but after the shutdown I do not know where I can find the log.
I can easily reproduce the bug, where I can copy the log in order to report here?

Thanks
Nitto

[penalvch (penalvch)]

Muhammet Aklan, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.13-rc2

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]