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is0lated

Member

Registered: 2013-02-06

Posts: 10

3.18.4-1 and Realtel RTL8192CU possible dhcp problem

When attempting to connect to a wifi network using a RTL8192CU based usb wifi adaptor I seem to get a dhcp time out, however switching back to 3.17.6-1 solves the issue. This issue was also repeatable using the 3.18.2-2 kernel, but I didn't investigate further.

When attempting to connect I use "sudo wifi-menu", select the network, and attempt to connect. When this fails the systemd log shows

● netctl@wlp0s18f2u6\x2dNETGEAR57.service - Networking for netctl profile wlp0s18f2u6-NETGEAR57
   Loaded: loaded (/usr/lib/systemd/system/netctl@.service; static; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2015-01-28 22:15:33 AEST; 1min 11s ago
     Docs: man:netctl.profile(5)
  Process: 497 ExecStart=/usr/lib/network/network start %I (code=exited, status=1/FAILURE)
 Main PID: 497 (code=exited, status=1/FAILURE)

Jan 28 22:15:03 Davlin dhcpcd[567]: wlp0s18f2u6: rebinding lease of 192.168.0.4
Jan 28 22:15:08 Davlin dhcpcd[567]: wlp0s18f2u6: DHCP lease expired
Jan 28 22:15:08 Davlin dhcpcd[567]: wlp0s18f2u6: soliciting a DHCP lease
Jan 28 22:15:33 Davlin dhcpcd[567]: timed out
Jan 28 22:15:33 Davlin network[497]: DHCP IPv4 lease attempt failed on interface 'wlp0s18f2u6'
Jan 28 22:15:33 Davlin network[497]: Failed to bring the network up for profile 'wlp0s18f2u6-NETGEAR57'
Jan 28 22:15:33 Davlin systemd[1]: netctl@wlp0s18f2u6\x2dNETGEAR57.service: main process exited, code=exited, status=1/FAILURE
Jan 28 22:15:33 Davlin systemd[1]: Failed to start Networking for netctl profile wlp0s18f2u6-NETGEAR57.
Jan 28 22:15:33 Davlin systemd[1]: Unit netctl@wlp0s18f2u6\x2dNETGEAR57.service entered failed state.
Jan 28 22:15:33 Davlin systemd[1]: netctl@wlp0s18f2u6\x2dNETGEAR57.service failed.

As I said, switching back to 3.17.6-1 solves the issue completely and I am able to connect without a problem.

Any tips for further trouble shooting?

EDIT: This issue appears to have been solved in 3.18.5-1
EDIT 2: It appears that it hasn't. I successfully connected when I first booted into 3.18.5-1 for the first time but have not been able to reconnect using that version.

Last edited by is0lated (2015-02-03 11:07:01)

fsarud

Member

Registered: 2012-10-22

Posts: 3

Re: 3.18.4-1 and Realtel RTL8192CU possible dhcp problem

Same issue here. But I can't connect even downgrading to 3.17.3. However, I found this:

https://github.com/raspberrypi/linux/issues/818

So, I think it's a matter of time.

But if there is a workaround, it's welcome.

Chill

Member

Registered: 2012-09-15

Posts: 7

Re: 3.18.4-1 and Realtel RTL8192CU possible dhcp problem

Try the 8192cu driver from the AUR. https://aur.archlinux.org/packages/8192cu-dkms/