desktop-packages team mailing list archive

[Tony Espy <1445134@xxxxxxxxxxxxxxxxxx>]

It looks like this bug was introduced in Ubuntu when the rebase to NM
0.9.10.0 occurred.

The function supplicant_iface_scan_done_cb is missing a call to
schedule_scan() which exists in the 0.9.8.x version of NM in utopic.  It
looks to me like the patch cull_aps_on_scan_done_signal.patch got
mangled and lost its call to schedule_scan().  Furthermore, when this
patch got re-worked and copied into the patch 0002-wifi-cull-the-scan-
list-before-signalling-ScanDone-b.patch, the same mistake was carried
over.  I checked and all of the upstream releases of NM still have a
schedule_scan() present in this function.

Here's a diff of the cull_aps_on_scan_done_signal.patch from NM 0.9.10.0
to the older 0.9.8.X version:

espy@shrike:% diff cull_aps_on_scan_done_signal.patch ~/dev/nm/nm-utopic-save/debian/patches/
10,14c10
< ---
<  src/devices/wifi/nm-device-wifi.c |   29 ++++++++++++++++++++++++-----
<  1 file changed, 24 insertions(+), 5 deletions(-)
< 
< Index: b/src/devices/wifi/nm-device-wifi.c
---
> Index: network-manager-0.9.8.8/src/nm-device-wifi.c
16,18c12,14
< --- a/src/devices/wifi/nm-device-wifi.c
< +++ b/src/devices/wifi/nm-device-wifi.c
< @@ -183,6 +183,10 @@ static void supplicant_iface_notify_scan
---
> --- network-manager-0.9.8.8.orig/src/nm-device-wifi.c
> +++ network-manager-0.9.8.8/src/nm-device-wifi.c
> @@ -200,6 +200,10 @@ static void supplicant_iface_notify_scan
29c25
< @@ -1609,14 +1613,20 @@ supplicant_iface_scan_done_cb (NMSupplic
---
> @@ -1810,14 +1814,22 @@ supplicant_iface_scan_done_cb (NMSupplic
50a47,50
> +
> +	schedule_scan (self, success);
>  }
>  
52,54c52
<  	if (priv->requested_scan) {
<  		priv->requested_scan = FALSE;
< @@ -1836,13 +1846,22 @@ cull_scan_list (NMDeviceWifi *self)
---
> @@ -2005,13 +2017,22 @@ cull_scan_list (NMDeviceWifi *self)

I'll rebuild with the line restored and report results.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1445134

Title:
  Network manager never scanning for new access points

Status in Canonical System Image:
  Confirmed
Status in network-manager package in Ubuntu:
  Confirmed

Bug description:
  While trying to reproduce another bug related with the last seen value
  from the access points, I noticed that network manager is never really
  scanning for new access points on my desktop, not even when not
  connected.

  $ sudo nmcli g logging level debug domains wifi_scan

  Then powered an access point, but was never really able to see it.
  From syslog, noticed that there is never really a scan, which explains
  why the ap never goes away and why it is not able to find it in the
  first place.

  If I force a scan via cmdline it works as expected (and I noticed a
  scan also happens when changing connections).

  Was also able to reproduce this issue on mako, with the following image:
  phablet@ubuntu-phablet:~$ system-image-cli -i
  current build number: 173
  device name: mako
  channel: ubuntu-touch/devel-proposed
  alias: ubuntu-touch/vivid-proposed
  last update: 2015-04-16 14:58:58
  version version: 173
  version ubuntu: 20150416
  version device: 20150210
  version custom: 20150416

  In the mako case, I booted with a known connection in place, it
  connected successfully but it never really scans for other access
  points. Scan works fine after disconnecting though.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: network-manager 0.9.10.0-4ubuntu14
  ProcVersionSignature: Ubuntu 3.19.0-14.14-generic 3.19.3
  Uname: Linux 3.19.0-14-generic x86_64
  ApportVersion: 2.17.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Apr 16 14:21:42 2015
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  InstallationDate: Installed on 2013-10-29 (534 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  IpRoute:
   default via 192.168.1.1 dev wlan0  proto static  metric 1024 
   10.0.3.0/24 dev lxcbr0  proto kernel  scope link  src 10.0.3.1 
   169.254.0.0/16 dev lxcbr0  scope link  metric 1000 
   192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.16
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to vivid on 2013-10-31 (532 days ago)
  mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2013-11-04T02:19:36.923463
  nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code 2: Error: Object 'nm' is unknown, try 'nmcli help'.

To manage notifications about this bug go to:
https://bugs.launchpad.net/canonical-devices-system-image/+bug/1445134/+subscriptions