Discussion between Lucas03 and chili555 - 2014-08-30

last day (15 days later) »

4:12 PM

0

A: lenovo e540 RTL8723be wifi not working

The system natively includes the driver rtl8723be. We need to troubleshoot the native driver. Before we do so, please uninstall the two drivers you installed that caused kernel panics. Follow the process you followed previously for both, except instead of make and sudo make install, do sudo make ...

thanks, I uninstalled both drivers. No kernel panic now. But now I'm missing rtl8723be driver. modprobe: FATAL: Module rtl8723be not found.. How do I install it?

If you are running 14.04.1, it should be present by default. Let's see if we can locate it: sudo updatedb This will take a few moments, please be patient. Then: locate rtl8723be.ko In my case, among others: /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl‌‌8723be.ko

yep, its there: /lib/modules/3.13.0-32-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rt‌‌l8723be.ko

And is 3.13.0-32 the kernel you are running right now? uname -r Do you have temporary ethernet or other connectivity so you can update?

no, i'm running 3.13.0-35-generic.

4:12 PM

Please see my edit above.

after that reinstall I run locale rtl8723be and only on same kernel version was found :(

Did you first: sudo updatedb? What about sudo modprobe rtl8723be?

I tried it now, no change. Updated question with output of locate rtl8723be.

4:31 PM

Are you here, Lucas?

yes

So, after you reinstalled linux-image and did an updatedb, there is still bo rtl8723be???

*no

yes

there are some files, like you could see in my question, but not .ko file.

You see it in -32 but not -35?

yes

I edited my question with 'locate rtl8723be'

4:36 PM

And, when you did the reinstall of linux-image, you were connected to the internet and there were no errors, warnings, etc.?

no smoke? sparks? grinding noises? (just kidding!)

:D

no, didnt notice anything

I'll do it again and share output with you

I actually ran the reinstall myself and I have:

/lib/modules/3.13.0-27-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
/lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
/lib/modules/3.13.0-30-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
/lib/modules/3.13.0-32-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
/lib/modules/3.13.0-33-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko
/lib/modules/3.13.0-34-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko

OK, thatnks. Since the output is likely to be lengthy, paste it here and give me the link: paste.ubuntu.com

paste.ubuntu.com/8189076

Looks perfect. Now please do: sudo updatedb

no output there

4:46 PM

perfect. Now locate rtl8723be.ko

lucas03@alfonz:/etc/modprobe.d$ locate rtl8723be.ko
/lib/modules/3.13.0-32-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be/rtl8723be.ko

KK-KK-Krazy!

and you are booted into -35? uname -r

I know you are, actually

yep, I am

please show me: ls /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/

That's lower case for LS

ls

ls /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/
ls: cannot access /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/: No such file or directory

4:51 PM

Wow.

ls /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/

Let's see how far up the chain has been deleted!

ls /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/
ls: cannot access /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/: No such file or directory
lucas03@alfonz:/etc/modprobe.d$ ls: cannot access /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/: No such file or directory
No command 'ls:' found, did you mean:
Command 'lsw' from package 'suckless-tools' (universe)
Command 'lsh' from package 'lsh-client' (universe)
Command 'ls' from package 'coreutils' (main)

sorry for those extra lines

I accidently copied them

Wow! coreutils isn't installed?? sudo apt-get install coreutils

Is this a minimal install or...what??

it is

Reading package lists... Done
Building dependency tree
Reading state information... Done
coreutils is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 17 not upgraded.

You didn't accidently type upper case I did you, instead of lower case L?

It looks like you found the command ls here: ls: cannot access /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi/: No such file or directory

I don't understand

where should I type upper case L?

4:59 PM

You got a notification here: No command 'ls:' found, did you mean:
Command 'lsw' from package 'suckless-tools' (universe)
Command 'lsh' from package 'lsh-client' (universe)
Command 'ls' from package 'coreutils' (main)
Command 'lsx' from package 'suckless-tools' (universe)
ls:: command not found

I accidently paste output that I was copying for you

Oh, OK, I am relieved!

no

wait

sorry

I did not copy it correctly

No problem, go ahead.

lucas03@alfonz:/etc/modprobe.d$ ls /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/
adm8211.ko at76c50x-usb.ko atmel.ko b43legacy hostap iwlwifi mac80211_hwsim.ko orinoco rndis_wlan.ko ti zd1211rw
airo_cs.ko ath atmel_pci.ko brcm80211 ipw2x00 libertas mwifiex p54 rt2x00 wl3501_cs.ko
airo.ko atmel_cs.ko b43 cw1200 iwlegacy libertas_tf mwl8k.ko ray_cs.ko rtl818x zd1201.ko

paste.ubuntu.com/8189236

5:02 PM

So it seems that you have everything BUT what you need!

yep

rtlwifi is missing

Do you have linux-headers, do you know?

I think so

should I reinstall those?

sudo dpkg -s linux-headers-generic

-s is for 'status'

lucas03@alfonz:/etc/modprobe.d$ sudo dpkg -s linux-headers-generic
Package: linux-headers-generic
Status: install ok installed
Priority: optional
Section: kernel
Installed-Size: 28
Maintainer: Ubuntu Kernel Team <kernel-team@lists.ubuntu.com>
Architecture: amd64
Source: linux-meta
Version: 3.13.0.35.42
Depends: linux-headers-3.13.0-35-generic
Description: Generic Linux kernel headers
This package will always depend on the latest generic kernel headers
available.

5:07 PM

awesome! Get this file and drag and drop it to your desktop: kernel.org/pub/linux/kernel/projects/backports/stable/v3.14/…

Right-click it and select 'Extract Here.'

Now,in a terminal:

cd ~/Desktop/backports-3.14-1

make defconfig-rtlwifi

make

and if all goes well, that is without error:

sudo make install

I will munch on my pizza while you proceed.

I installed that

but there is no rtl8723be

Checking...

paste.ubuntu.com/8189307

5:24 PM

So why, oh why, is it present in 3.13 but not 3.14?? (A rhetorical question)

:)

can't I just copy that file from kernel 32?

Probably not. Did you already ty any backports package?

no

(don't know what that is actually)

I mean, you can certainly try, but who knows what might happen. Nothing harmful, but it just might spit out an error and refuse to work

Let's try, just for fun

sudo mkdir /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi

sudo cp /lib/modules/3.13.0-32-generic/kernel/drivers/net/wireless/rtlwifi/rtl8723be.ko /lib/modules/3.13.0-35-generic/kernel/drivers/net/wireless/rtlwifi

sudo modprobe rtl8723be

note and post any errors or warnings

Nope, I have that wrong

stop

ok

but there are more files

shouldnt I copy them all?

lucas03@alfonz:/lib/modules/3.13.0-32-generic/kernel/drivers/net/wireless/rtlwifi$ ls
btcoexist rtl8723be rtlwifi.ko

5:32 PM

no, stop. I will start over.

first two are directories

ok

rtl8723be has many dependencies. depends: rtlwifi,rtl8723-common,rtl_pci,btcoexist,mac80211

we'd have to copy all and their directories.

may be it would be better to just delete kernel 35

in less time, we can compile the right package

no

Get this file to your desktop: kernel.org/pub/linux/kernel/projects/backports/stable/v3.16/…

I already compiled it and it does contain rtl8723be

cd ~/Desktop/backports-3.16-1
make defconfig-rtlwifi
make
and if all goes well, that is without error:
sudo make install

/home/chili/Downloads/backports-3.16-1/drivers/net/wireless/rtlwifi/rtl8723ae/rt‌l8723ae.ko

sorry, I meant:

/home/chili/Downloads/backports-3.16-1/drivers/net/wireless/rtlwifi/rtl8723be/rt‌l8723be.ko

After sudo make install, try:

sudo modprobe rtl8723be

It will install the driver and all it's little dependencies the right way in the right places

no errors, so I'm running sudo make install

5:41 PM

woohoo!

but I don't get your reply with filepaths.

just to show that the 3.16 package DOES include rtl8723be

paste.ubuntu.com/8189509

cant read private key?

no prob

sudo modprobe rtl8723be

no error :)

no output

5:44 PM

when you click the Network Manager icon, can you see wireless networks?

no

any clues showing here: dmesg | grep rtl

yep, error

[16863.848013] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
[16863.848298] rtl8723be 0000:05:00.0: Direct firmware load failed with error -2
[16863.848301] rtl8723be 0000:05:00.0: Falling back to user helper
[16863.848718] rtlwifi: Firmware rtlwifi/rtl8723befw.bin not available

That's an easy one! Jus sec

sudo apt-get install --reinstall linux-firmware

did that go OK?

yes

just installed

5:51 PM

sudo modprobe -r rtl8723be && sudo modprobe rtl8723be

wifi appeared! Thanks!

dmesg | grep rtl <--did iy find and load the firmware?

woohoo!

[17375.726277] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
[17375.730394] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[17375.730635] rtlwifi: wireless switch is on

i'm going to try it out

Please detach the ethernet and connect with wireless, tell me if it's stable

it works. But I had problems, that after few minutes or hours I got disconnected

should I disable sleep mode or something like that?

In case I ran into these problems again, should I create new question?

5:55 PM

There are a couple of things to look at. Is power management on or off? iwconfig

eth0 no wireless extensions.

lo no wireless extensions.

wlan0 IEEE 802.11bgn ESSID:"Lolco-home ;)"
Mode:Managed Frequency:2.452 GHz Access Point: 00:25:9C:BD:15:FA
Bit Rate=150 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-10 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:30 Missed beacon:0

If you have the problem again, email me and we'll come back to this chat and work on it: wrweston@ubuntu.com

ok, thanks a lot! have a good day!

you are using a newer driver version, from kernel 3.16 updated from the kernel you are running 3.13

See ya, Lucas! Good luck!

last day (15 days later) »

Transcript for

Aug '1430

Discussion between Lucas03 and chili555

Imported from a comment discussion on askubuntu.com/questions/...

lenovo realtek wireless

join this room
about this room

00:00

06:00

12:00

18:00

all times are UTC

site design / logo © 2024 Stack Exchange Inc; legal

mobile