Re: rtl8723be on Fedora27

["Rákosi Gergely" <rakosi.gergely@gmail.com>]

2017-11-23 19:24 keltezéssel, Larry Finger írta:
> On 11/23/2017 08:36 AM, Rákosi Gergely wrote:
>> 2017-11-21 22:30 keltezéssel, James Cameron írta:
>>> On Tue, Nov 21, 2017 at 09:52:12PM +0100, Rákosi Gergely wrote:
>>>> 2017-11-21 21:37 keltezéssel, James Cameron írta:
>>>>> On Tue, Nov 21, 2017 at 03:08:16PM +0100, Rákosi Gergely wrote:
>>>>>> 2017-11-18 16:52 keltezéssel, Larry Finger írta:
>>>>>>> On 11/17/2017 06:22 PM, Rákosi Gergely wrote:
>>>>>>>> Hello Larry,
>>>>>>>>
>>>>>>>> First of all, thanks your help.
>>>>>>>> Lets see...here is the kernel version: 4.13.12-300
>>>>>>>> The machine is an Asus ROG 553VE
>>>>>>>>
>>>>>>>> The firmware which loading in the dmesg is :
>>>>>>>> rtlwifi/rtl8723befw_36.bin
>>>>>>>> The output of md5sum is : 1850c1308fbcd95e9f6a7f58ede1e35f
>>>>>>> [...]
>>>>>>> sudo iw dev wlan0 scan | egrep "SSID|signal"
>>>>>>>
>>>>>>> Post that output. In addition, copy the dmesg output to some
>>>>>>> pastebin
>>>>>>> and post the link as well.
>>>>>>>
>>>>>>> Larry
>>>>>>>
>>>>>> Hello Larry,
>>>>>>
>>>>>> I hope this email post format is good, and fit to the rules.
>>>>>> Here is the output:
>>>>>>
>>>>>> root@skynet-x2 ~]# iw dev wlp2s0 scan | egrep "SSID|signal"
>>>>>>          signal: -46.00 dBm
>>>>>>          SSID: SKYNET-X2
>>>>>> [...]
>>>>>> [root@skynet-x2 ~]#
>>>>> Scan results seem normal.  Was this scan before disconnect?
>>>> Yes, this command output taken while the connection was OK
>>> Thanks.
>>>
>>>>>> And the dmesg output:
>>>>>>
>>>>>> https://pastebin.com/iqQSu2hD
>>>>> Is now v4.13.13.
>>>> Yes, thats the upgraded kernel
>>>>
>>>>> This is interesting, an H2C command was dropped, but no idea which.
>>>>>
>>>>> [    9.848052] rtl8723be: error H2C cmd because of Fw download
>>>>> fail!!!
>>>>>
>>>>> Disconnection happened at boot+440 seconds, associate+429 seconds;
>>>>>
>>>>> [  439.871033] rtlwifi: AP off, try to reconnect now
>>>>> [  439.871093] wlp2s0: Connection to AP 4c:5e:0c:c7:fa:e3 lost
>>>>>
>>>>> I cannot tell what causes disconnect.  I wonder if the same
>>>>> timing of the problem happens always, or if the timing varies.
>>>> The timing always changing, never is the same. And I dont realize
>>>> the cause at now...
>>> Thanks.  I had similar problem with different wireless device.
>>>
>>>>> Init MAC failed was another 30 seconds later;
>>>>>
>>>>> [  468.600670] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready
>>>>> [  469.618926] rtl8723be: Init MAC failed
>>>>>
>>>>> Looking at _rtl8723be_init_mac, there are two false returns;
>>>>> hardware power on fail, and llt write fail.
>>>>>
>>>>> Sorry, I don't have rtl8723be hardware.
>>>>>
>>>>> Rákosi, did any older kernel keep connection?
>>>> The oldest kernel is 4.13.9-300.fc27.x86_64 in Fedora 27
>>>> installation, but did the same.  If you can give advise how, and
>>>> what I do, then I'll try it.
>>> You might try running "Live CD" of Fedora 26 or Fedora 25, without
>>> installing, to test if unexpected disconnection happens in two older
>>> kernels.  Not for permanent solution, just for easy testing.
>>>
>>> I don't have specific advice for Fedora 27, you might ask Fedora
>>> community about that, or use RHBZ.  A quick search finds this old 2013
>>> page;
>>>
>>> https://fedoraproject.org/wiki/User:Ignatenkobrain/Kernel/Bisection
>>>
>> And now the wireless is working almost 20 hours long, from yesterday
>> afternoon. I dont know why. Lets check some happening:
>> - Yesterday I disconnect the charger from laptop, and lay down at the
>> other room
>> - I left the laptop more than a hour without interaction, so the system
>> is going to sleep
>> - When I push the keyboard the system load up, and everything is working
>> fine
>> - The battery almost depleted when I going back to the original room,
>> and connect the charger
>>
>> Then nothing changed, and I have a working rtl8723be wifi module. Why ?
>
> Who knows? I do not understand why it did not work before the way mine
> does with openSUSE!
>
> Larry
>
>
I found a workaround! If I power up the laptop, and check the wifi, and
if it is OK, then I close down the screen (thats mean laptop going to
sleep). After I open it, and just using like normal, then the connection
working well for a day, or more.
If I dont do that, then comes up the usual problem.

What ? Anybody have an idea what is it mean, and how ?

Thanks
Gergely