CID: 201412-16319 Dell Latitude 3150
CID: 201407-15273 Dell Latitude 3450
Running hibernate or suspend will trigger a rfkill event on resume and toggle both of the Wireless network and Bluetooth, so they will be blocked when you suspend it for the first time, and be re-enabled when you suspend it again.
After the first suspend, "rfkill list" shows:
ubuntu@201412-16319:~$ cat rfkill
0: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: yes
1: dell-wifi: Wireless LAN
Soft blocked: yes
Hard blocked: no
2: dell-bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: no
You may unblock then with the wireless hotkey, however, on 201412-16319, sometime the wireless can't be re-enable with the hotkey (fail rate: 3~4 out of 12), I will need to suspend this system again to make wireless back to work. (0 out of 12 on 201407-15273)
I noticed that this issue seems to happen only on the system with an individual wireless key input event:
$ sudo evtest
/dev/input/event6: DELL Wireless hotkeys
(A 14.04.2 certified Dell Vostro 5470 ,CID: 201307-14037, does not have this issue, and it does not have a wireless key input event in evtest, the wireless key event is called KEY_WLAN and is integrated in Dell WMI hotkeys event)
If you use evtest to monitor this wireless hotkey event, I can see that it will send a rfkill event after resume from suspend:
ubuntu@201407-15273:~$ sudo evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: Lid Switch
/dev/input/event1: Power Button
/dev/input/event2: Sleep Button
/dev/input/event3: Power Button
/dev/input/event4: AT Translated Set 2 keyboard
/dev/input/event5: SynPS/2 Synaptics TouchPad
/dev/input/event6: DELL Wireless hotkeys
/dev/input/event7: Video Bus
/dev/input/event8: HDA Intel PCH Headphone Mic
/dev/input/event9: Dell WMI hotkeys
/dev/input/event10: HDA Intel HDMI HDMI/DP,pcm=3
/dev/input/event11: HDA Intel HDMI HDMI/DP,pcm=7
/dev/input/event12: HDA Intel HDMI HDMI/DP,pcm=8
/dev/input/event13: Integrated_Webcam_HD
Select the device event number [0-13]: 6
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "DELL Wireless hotkeys"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 247 (KEY_RFKILL)
Properties:
Testing ... (interrupt to exit)
Event: time 1442315336.476988, -------------- SYN_REPORT ------------
Event: time 1442315379.463923, type 1 (EV_KEY), code 247 (KEY_RFKILL), value 1
Event: time 1442315379.463923, -------------- SYN_REPORT ------------
Event: time 1442315379.463927, type 1 (EV_KEY), code 247 (KEY_RFKILL), value 0
Event: time 1442315379.463927, -------------- SYN_REPORT ------------
(The first SYN_REPORT here is for suspend, as when you press the wireless hotkey it will send out the "type 1 (EV_KEY)" information first)
Steps to reproduce:
1. Install 14.04.2 + update
2. Suspend it from the system menu
3. Wake it up.
4. Suspend it again.
5. Wake it up
Expected result:
* Wireless and Bluetooth should be working all the time.
Actual result:
* They got disabled on the first, third, fifth... cycle.
You can verify it here with "sudo pm-hibernate" too, and will get the same result.
This issue can be reproduced on 3.16 and 3.19 kernel. And some pre-installed systems.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-49-generic 3.16.0-49.65~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
Uname: Linux 3.16.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Sep 15 00:17:34 2015
InstallationDate: Installed on 2015-09-11 (4 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)
---
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 1574 F.... pulseaudio
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=c9ac4cb4-606e-492c-a4a0-c511bad7444f
InstallationDate: Installed on 2015-09-11 (4 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0c45:6709 Microdia
Bus 001 Device 036: ID 8087:0a2a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. Latitude 3150
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-49-generic root=UUID=f071bd28-7686-4baa-a134-8392289e49d2 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
RelatedPackageVersions:
linux-restricted-modules-3.16.0-49-generic N/A
linux-backports-modules-3.16.0-49-generic N/A
linux-firmware 1.127.15
Tags: trusty
Uname: Linux 3.16.0-49-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 07/31/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
dmi.board.name: 021010
dmi.board.vendor: Dell Inc.
dmi.board.version: D02
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA02:bd07/31/2015:svnDellInc.:pnLatitude3150:pvr:rvnDellInc.:rn021010:rvrD02:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude 3150
dmi.sys.vendor: Dell Inc.
apport information