Kernel module(r8712u) reload - suspend/resume - systemd

Kernel module(r8712u) reload - suspend/resume - systemd

[poma]

It is tested and works, 

# systemctl suspend

[  144.218876] PM: Entering mem sleep
[  144.219249] r8712u 2-3:1.0 wlp0s4f1u3: Suspending...
[  144.219255] r8712u 2-3:1.0 wlp0s4f1u3: Unable to suspend

            & RESUME

[  146.844240] r8712u 2-3:1.0 wlp0s4f1u3: Resuming...
[  146.844241] r8712u 2-3:1.0 wlp0s4f1u3: Unable to resume
[  147.015962] PM: Finishing wakeup.
[  154.029573] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  177.489082] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  200.499708] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  233.514654] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  276.498402] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  329.498037] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  392.507363] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  455.559545] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  518.540179] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1
[  581.533404] r8712u 2-3:1.0 wlp0s4f1u3: In r8711_wx_set_scan: bDriverStopped=1

~~~~~~~~~~~~~~

# nmcli device 
DEVICE      TYPE      STATE         CONNECTION 
wlp0s4f1u3  wifi      disconnected  --         

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/etc/systemd/system/r8712u-reload.service
[Unit]
Description=Reload rtl871x wireless lan driver after system resume
After=hibernate.target suspend.target hybrid-sleep.target

[Service]
Type=oneshot
ExecStart=/usr/sbin/modprobe -r r8712u
ExecStart=/usr/sbin/modprobe r8712u

[Install]
WantedBy=hibernate.target suspend.target hybrid-sleep.target

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# systemctl enable r8712u-reload.service

~~~~~~~~~~~~~~~~~~~

# systemctl suspend

[  616.251430] PM: Entering mem sleep
[  616.251962] r8712u 2-3:1.0 wlp0s4f1u3: Suspending...
[  616.251965] r8712u 2-3:1.0 wlp0s4f1u3: Unable to suspend

            & RESUME

[  619.008122] r8712u 2-3:1.0 wlp0s4f1u3: Resuming...
[  619.008124] r8712u 2-3:1.0 wlp0s4f1u3: Unable to resume
[  619.195001] PM: Finishing wakeup.
[  620.073126] usb 2-3: reset high-speed USB device number 3 using ehci-pci
[  620.209187] r8712u: module is from the staging directory, the quality is unknown, you have been warned.
[  620.209785] r8712u: Staging version
[  620.209802] r8712u: register rtl8712_netdev_ops to netdev_ops
[  620.209807] usb 2-3: r8712u: USB_SPEED_HIGH with 4 endpoints
[  620.210253] usb 2-3: r8712u: Boot from EFUSE: Autoload OK
[  620.583476] usb 2-3: r8712u: CustomerID = 0x0000
[  620.583489] usb 2-3: r8712u: MAC Address from efuse = 00:01:02:03:04:05
[  620.583498] usb 2-3: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
[  620.584238] usbcore: registered new interface driver r8712u
[  620.589721] r8712u 2-3:1.0 wlp0s4f1u3: renamed from wlan0
[  627.183840] r8712u 2-3:1.0 wlp0s4f1u3: 1 RCR=0x153f00e
[  627.184345] r8712u 2-3:1.0 wlp0s4f1u3: 2 RCR=0x553f00e
[  627.288231] IPv6: ADDRCONF(NETDEV_UP): wlp0s4f1u3: link is not ready
[  627.592219] IPv6: ADDRCONF(NETDEV_UP): wlp0s4f1u3: link is not ready
[  627.896222] IPv6: ADDRCONF(NETDEV_UP): wlp0s4f1u3: link is not ready
[  628.201217] IPv6: ADDRCONF(NETDEV_UP): wlp0s4f1u3: link is not ready
[  648.740663] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s4f1u3: link becomes ready

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# nmcli device 
DEVICE      TYPE      STATE         CONNECTION 
wlp0s4f1u3  wifi      connected     AP 


but is there a better way to do it?


poma

Re: Kernel module(r8712u) reload - suspend/resume - systemd

[poma]

On 28.10.2014 00:15, Lennart Poettering wrote:
> On Mon, 27.10.14 23:43, poma (pomidorabelisima@gmail.com) wrote:
> 
>> but is there a better way to do it?
> 
> This appears to be a kernel driver bug. Please report this issue
> against the kernel driver in question, systemd is not the right place
> to work around that.
> 
> Lennart
> 

It's not a bug, it's a feature, just as true for the systemd. :)
Given the condition of the entire Linux Wireless LAN stack this can go actually.


poma

Re: Kernel module(r8712u) reload - suspend/resume - systemd

[poma]

On 30.10.2014 09:52, Lubomir Rintel wrote:
> 
> On Tue, 2014-10-28 at 00:43 +0100, poma wrote:
>> On 28.10.2014 00:15, Lennart Poettering wrote:
>>> On Mon, 27.10.14 23:43, poma (pomidorabelisima@gmail.com) wrote:
>>>
>>>> but is there a better way to do it?
>>>
>>> This appears to be a kernel driver bug. Please report this issue
>>> against the kernel driver in question, systemd is not the right place
>>> to work around that.
>>>
>>> Lennart
>>>
>>
>> It's not a bug, it's a feature, just as true for the systemd. :)
>> Given the condition of the entire Linux Wireless LAN stack this can go actually.
> 
> Correct.
> 
> Moreover the driver is actually only in the staging/ ("crap") tree which
> means it has known serious quality issues and needs work. You may want
> to forward your original bug report to Larry & Florian. See [1].
> 
> [1] https://github.com/torvalds/linux/blob/master/drivers/staging/rtl8712/TODO
> 
> Lastly, please do _NOT_ cross-post to multiple unrelated mailing lists.
> The discussion then gets disconnected.
> 
> Regards,
> Lubo
> 
> 

Thanks Lubo.

[1]
TODO:
- merge Realtek's bugfixes and new features into the driver
- switch to use LIB80211
- switch to use MAC80211
- checkpatch.pl fixes - only a few remain
...

Guys, is it gonna happen?


poma