Lenovo Yoga 11s Wireless woes

**d-john** · April 20th, 2015

Hmm. I am disappointed. I read a few reviews online from people who reported they got this to work using a downloaded driver.

So is there hope that the original driver can be fixed? Or would I be better off getting a $10 nano wireless adapter and using up one of my USB ports?

Adding a wireless adapter seems inelegant, but I don't want to take up too much of your time.

**chili555** · April 20th, 2015

I think the hope is on the low side; yours is a relatively new device with a very new Linux driver. My usual process is to load the driver, try to connect and then look at dmesg for clues as to what going on or, more precisely, what's going wrong. I Google the errors and warnings and hope that someone has a solution. In some cases, a driver parameter can help:

Code:

options r8723au some_parameter=Y

There are many available for this driver:

Code:

modinfo r8723au
<snip>
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           rtw_regulatory_id:int
parm:           ifname:The default name to allocate for first interface (charp)
parm:           if2name:The default name to allocate for second interface (charp)
parm:           rtw_channel_plan:int
parm:           rtw_chip_version:int
parm:           rtw_rfintfs:int
parm:           rtw_channel:int
parm:           rtw_wmm_enable:int
parm:           rtw_vrtl_carrier_sense:int
parm:           rtw_vcs_type:int
parm:           rtw_busy_thresh:int
parm:           rtw_ht_enable:int
parm:           rtw_cbw40_enable:int
parm:           rtw_ampdu_enable:int
parm:           rtw_rx_stbc:int
parm:           rtw_ampdu_amsdu:int
parm:           rtw_lowrate_two_xmit:int
parm:           rtw_rf_config:int
parm:           rtw_power_mgnt:int
parm:           rtw_smart_ps:int
parm:           rtw_low_power:int
parm:           rtw_wifi_spec:int
parm:           rtw_antdiv_cfg:int
parm:           rtw_enusbss:int
parm:           rtw_hwpdn_mode:int
parm:           rtw_hwpwrp_detect:int
parm:           rtw_hw_wps_pbc:int
parm:           rtw_max_roaming_times:The max roaming times to try (uint)
parm:           rtw_80211d:Enable 802.11d mechanism (int)
parm:           rtw_btcoex_enable:Enable BT co-existence mechanism (int)
parm:           rtw_notch_filter:0:Disable, 1:Enable, 2:Enable only for P2P (uint)
parm:           debug:Set debug level (1-9) (default 1) (int)

The trouble is that there is no documentation that I've been able to find that tells us what each parameter does or undoes.

I suggest you try the process I outlined above and let's see what we see.

Code:

sudo modprobe -r 8723au
sudo modprobe r8723au
dmesg | tail -n20

I think the driver will improve; a few kernel versions from now, we'll laugh at these bad old days! When that may be, I can't predict. In the meantime, an inelegant USB can tide you over.

Don't worry about my time; I've been here for years and I'll be here for many more.

**d-john** · April 21st, 2015

Results:

Code:

[46236.196747] RTL8723AU: ERROR indicate disassoc
[46240.257271] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46240.257279] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46244.256711] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46244.256732] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46248.259968] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46248.259976] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46252.259953] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46252.259960] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46255.089656] r8723au: module is from the staging directory, the quality is unknown, you have been warned.
[46255.159892] usbcore: registered new interface driver rtl8723au
[46255.198014] rtl8723au: Loading firmware rtlwifi/rtl8723aufw_B.bin
[46255.199789] RTL8723AU: Firmware Version 33, SubVersion 0, Signature 0x2302
[46255.619190] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[46255.623385] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[46259.173993] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46259.174001] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46259.632013] RTL8723AU: ERROR nolinked power save enter
[46263.176656] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46263.176664] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)

**chili555** · April 21st, 2015

We have two issues going on here. First, we see:

RTL8723AU: ERROR indicate disassoc

And a Google search finds this: https://github.com/lwfinger/rtl8723au/issues/17 The exact same error is quoted and the issue is discussed by the driver's author! He suggests:

You might try loading the driver with a 'rtw_power_mgnt=0' option. As I read the code, that should disable power management.

Let's try that:

Code:

sudo -i
echo "options r8723au rtw_power_mgnt=0  >  /etc/modprobe.d/r8723au.conf
exit

And then reboot.

Next, we see:

[46240.257271] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46240.257279] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46244.256711] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)
[46244.256732] ACPI Error: Method parse/execution failed [\_SB_.PCI0.LPCB.EC0_.TSKN._TMP] (Node ffff88015a868c08), AE_NOT_FOUND (20140424/psparse-536)
[46248.259968] ACPI Error: [\_SB_.PCI0.LPCB.EC0_.ECRD] Namespace lookup failure, AE_NOT_FOUND (20140424/psargs-359)

This is, as far as I know, not caused by wireless, however, it may have an impact on wireless. I am inexperienced in ACPI matters but I suggest you both Google and ask here: http://ubuntuforums.org/forumdisplay.php?f=331 I suspect (with little or no knowledge to support it!) that either a change in the BIOS or an updated BIOS may help.

**d-john** · April 21st, 2015

Did your first suggestion. It worked just long enough to make me excited -- then it stopped. Again. I ca't get it to connect again now. Even after a few reboots.

I'll ask about the ACPI error. Can't be BIOS because this is a UEFI machine. I checked for an update on the manufacturers website and got nothing.

I could jump to 15.04, I suppose. It has a new kernel. Perhaps it contains updated drivers that will make everything work like magic...

**chili555** · April 21st, 2015

Originally Posted by d-john

I could jump to 15.04, I suppose. It has a new kernel. Perhaps it contains updated drivers that will make everything work like magic...

You could certainly download and try a live session.

...or you could get a US$10 USB wireless and wait a few months for the driver to evolve.

**d-john** · April 21st, 2015

The $10 USB adapter was my original thought -- but I thought you wanted one more go at this. I'm pretty much ready to throw in the towel and buy an adapter at this point.

**d-john** · April 21st, 2015

I'm ready to throw in the towel I think. 15.04 is getting released this month, right? So improvements are on the way. I'm going to order my adapter.

**chili555** · April 21st, 2015

15.04 is getting released this month, right?

That's correct, April 23; however, you can download and try the Beta 2 right now. I have it installed on an old Thinkpad now and I haven't found a problem yet.

I generally download and install a few days prior to any official release date because wireless and networking questions will come hot and heavy release morning and because the download mirrors are clogged like crazy on release morning and for several days thereafter.

http://releases.ubuntu.com/15.04/