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George528
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PostPosted: Tue Jun 08, 2021 8:28 am    Post subject: wlan0 Interface doesn't support scanning. Reply with quote

Hello, i am trying to set up a wireless internet connection but can't seem to do it.
i am following this guide: https://www.linux.com/training-tutorials/how-configure-wireless-any-linux-desktop/

when i run a scan i get this error:

Code:
satellite ~ # iwlist wlan0 scan
wlan0     Interface doesn't support scanning.



I made sure to enable the drivers in the kernel; when i run ifconfig, the interface wlan0 is showing.

when i run lspci:
Code:
satellite ~ # lspci | grep -i wifi
06:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)


Any help will be appriciated.
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alamahant
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PostPosted: Tue Jun 08, 2021 8:43 am    Post subject: Reply with quote

Is it up?
Code:

ip link set wlan0 up

Try also
Code:

rfkill list
rfkill unblock <>

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George528
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PostPosted: Tue Jun 08, 2021 8:54 am    Post subject: Reply with quote

alamahant wrote:
Is it up?
Code:

ip link set wlan0 up

Try also
Code:

rfkill list
rfkill unblock <>


the wlan was already up, since it was showing in ifconfig without "-a" argument, but i run the ip link set wlan0 up command just in case.

when i run rfkill:

Code:
satellite ~ # rfkill list
0: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no


there is nothing to be unblocked[/b]
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alamahant
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PostPosted: Tue Jun 08, 2021 8:59 am    Post subject: Reply with quote

Missing firmware?
Do you have
linux-firmware installed?
Also
Code:

CONFIG_RTL8192CE=m
CONFIG_RTLWIFI=m
CONFIG_RTLWIFI_PCI=m
CONFIG_RTLWIFI_USB=m
CONFIG_RTL8192C_COMMON=m
CONFIG_RTLBTCOEXIST=m

in your .config
?
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George528
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PostPosted: Tue Jun 08, 2021 9:14 am    Post subject: Reply with quote

alamahant wrote:
Missing firmware?
Do you have
linux-firmware installed?
Also
Code:

CONFIG_RTL8192CE=m
CONFIG_RTLWIFI=m
CONFIG_RTLWIFI_PCI=m
CONFIG_RTLWIFI_USB=m
CONFIG_RTL8192C_COMMON=m
CONFIG_RTLBTCOEXIST=m

in your .config
?


i checked all these modules in kernel's .config and everything was already enabled (to m)

also firmware-linux was also installed, but i reinstalled it just in case
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alamahant
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PostPosted: Tue Jun 08, 2021 9:51 am    Post subject: Reply with quote

Code:

modprobe rtl8192ce
lsmod | grep  rtl8192ce

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George528
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PostPosted: Tue Jun 08, 2021 9:53 am    Post subject: Reply with quote

alamahant wrote:
Code:

modprobe rtl8192ce
lsmod | grep  rtl8192ce


this is what i got
Code:
george@satellite ~ $ modprobe rtl8192ce
george@satellite ~ $  lsmod | grep  rtl8192ce
rtl8192ce              73728  0
rtl_pci                36864  1 rtl8192ce
rtl8192c_common        57344  1 rtl8192ce
rtlwifi               110592  3 rtl_pci,rtl8192c_common,rtl8192ce
george@satellite ~ $
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alamahant
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PostPosted: Tue Jun 08, 2021 9:59 am    Post subject: Reply with quote

Do you have things like
Code:

CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
CONFIG_CFG80211_DEBUGFS=y
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_CFG80211_WEXT_EXPORT=y
CONFIG_LIB80211=m
CONFIG_LIB80211_CRYPT_WEP=m
CONFIG_LIB80211_CRYPT_CCMP=m
CONFIG_LIB80211_CRYPT_TKIP=m
# CONFIG_LIB80211_DEBUG is not set
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_APDS9802ALS=m
CONFIG_MAC80211_HWSIM=m

?
My output with modprobe
Code:

modprobe rtl8192ce
 lsmod | grep  rtl8192ce


rtl8192ce              77824  0
rtl_pci                36864  1 rtl8192ce
rtl8192c_common        69632  1 rtl8192ce
rtlwifi               131072  3 rtl_pci,rtl8192c_common,rtl8192ce
mac80211             1159168  5 rtl_pci,ath9k,rtlwifi,rtl8192ce,ath9k_hw

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George528
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PostPosted: Tue Jun 08, 2021 10:12 am    Post subject: Reply with quote

alamahant wrote:
Do you have things like
Code:

CONFIG_CFG80211_REQUIRE_SIGNED_REGDB=y
CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=y
CONFIG_CFG80211_DEFAULT_PS=y
CONFIG_CFG80211_DEBUGFS=y
CONFIG_CFG80211_CRDA_SUPPORT=y
CONFIG_CFG80211_WEXT=y
CONFIG_CFG80211_WEXT_EXPORT=y
CONFIG_LIB80211=m
CONFIG_LIB80211_CRYPT_WEP=m
CONFIG_LIB80211_CRYPT_CCMP=m
CONFIG_LIB80211_CRYPT_TKIP=m
# CONFIG_LIB80211_DEBUG is not set
CONFIG_MAC80211=m
CONFIG_MAC80211_HAS_RC=y
CONFIG_MAC80211_RC_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT_MINSTREL=y
CONFIG_MAC80211_RC_DEFAULT="minstrel_ht"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
CONFIG_MAC80211_DEBUGFS=y
# CONFIG_MAC80211_MESSAGE_TRACING is not set
# CONFIG_MAC80211_DEBUG_MENU is not set
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
CONFIG_APDS9802ALS=m
CONFIG_MAC80211_HWSIM=m

?
My output with modprobe
Code:

modprobe rtl8192ce
 lsmod | grep  rtl8192ce


rtl8192ce              77824  0
rtl_pci                36864  1 rtl8192ce
rtl8192c_common        69632  1 rtl8192ce
rtlwifi               131072  3 rtl_pci,rtl8192c_common,rtl8192ce
mac80211             1159168  5 rtl_pci,ath9k,rtlwifi,rtl8192ce,ath9k_hw


i checked and everything was set as you said except these:
Code:
# CONFIG_CFG80211_DEBUGFS is not set
# CONFIG_CFG80211_WEXT is not set
CONFIG_CFG80211_WEXT_EXPORT was not found

CONFIG_LIB80211 was not found and the rest if them

# CONFIG_MAC80211_MESH is not set
# CONFIG_MAC80211_DEBUGFS is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_MAC80211_HWSIM is not set


should i enable them and then recompile the kernel?
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alamahant
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PostPosted: Tue Jun 08, 2021 10:17 am    Post subject: Reply with quote

You can try...
If it is not working with the provided driver then maybe consider
https://github.com/FreedomBen/rtl8188ce-linux-driver
and build the driver yourself.
It displays badly so here is the readme
[url]

https://github.com/FreedomBen/rtl8188ce-linux-driver/blob/master/README.md#start-of-content
[/url]
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