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freijon

Member

From: Switzerland

Registered: 2014-04-05

Posts: 39

wifi doesn't work with LTS Kernel after systemd update

Hi all,

After the update of systemd (216-3 -> 217-6), my wifi was not detected after boot. "dmesg" contains the following lines:

[    9.877366] Intel(R) Wireless WiFi driver for Linux, in-tree:
[    9.877368] Copyright(c) 2003- 2014 Intel Corporation
[    9.877406] iwlwifi 0000:25:00.0: enabling device (0000 -> 0002)
[    9.877470] iwlwifi 0000:25:00.0: can't disable ASPM; OS doesn't have ASPM control
[    9.877535] iwlwifi 0000:25:00.0: irq 50 for MSI/MSI-X
[    9.877663] iwlwifi 0000:25:00.0: Direct firmware load failed with error -2
[    9.877665] iwlwifi 0000:25:00.0: Falling back to user helper

when running "rfkill list", it shows me:

$ rfkill list
0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: hp-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: hp-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no

There are two workarounds:
- Downgrade "systemd" to version 216-3 with the LTS kernel (linux-lts 3.14.23-1)
- Use the non-LTS kernel (linux 3.17.2-1) with most recent "systemd" version (systemd 217-6)

Preferred solution:
- Use most recent version of "systemd" with the LTS kernel

Is there any way to find out whats causing this problem? I really want to fix this.

P.S. feel free to move my post if its in the wrong section

Last edited by freijon (2014-11-12 17:21:08)

freijon

Member

From: Switzerland

Registered: 2014-04-05

Posts: 39

Re: wifi doesn't work with LTS Kernel after systemd update

any ideas? I have annoying issues with the current kernel version (GPU hangs) and therefore really need to use linux-lts