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Problematic RTL8188EE Wireless Network Adapter


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# 1  
Question Problematic RTL8188EE Wireless Network Adapter

Good Day All,
There are numerous results when searching google on this issue, however, none seem to have a solution.
I have read until my eyes bleed and banged my head on the table more than once! Smilie

I am hoping to resolve this issue -- or at least have a decent workaround.
It is a real pain not to be able to put my laptop in standby knowing that if I do, I will have to reboot to regain my wireless connectivity.

I have copied snippets from **lshw** which first shows what type of system we are dealing with and then the state that the
wireless adapter is left in after going into sleep mode.

Unloading and reloading the drivers, obviously, has no effect. The card stays disabled.

My question:
Is there a way (via scripting or creating a small piece of executable code) to access the hardware, turn the wireless adapter back on,
and reload the drivers to regain connectivity without rebooting?


I am using Fedora 21 with the most recent kernel updates...

I can provide whatever other information that might be needed for this project very expeditiously.
Many people will be benefited by a workaround for this issue.

Code snippets...

Code:
root@redbrick /home/redbrick: uname -a
Linux redbrick 3.19.5-200.fc21.x86_64 #1 SMP Mon Apr 20 19:51:56 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Code:
    redbrick                  
    description: Notebook
    product: HP Pavilion 15 Notebook PC (L0Q40UA#ABA)
    vendor: Hewlett-Packard
    version: 0971120002405F10000620180
    serial: 5CD5091N1V
    width: 64 bits
    capabilities: smbios-2.7 dmi-2.7 vsyscall32
    configuration: administrator_password=disabled boot=normal chassis=notebook family=103C_5335KV G=N L=CON B=HP S=PAV X=Null sku=L0Q40UA#ABA uuid=35434435-3039-314E-3156-D0BF9C8A3141
     *-core
       description: Motherboard
       product: 2293
       vendor: Hewlett-Packard
       physical id: 0
       version: 78.21
       serial: PEWMT028J8A0XM
       slot: Type2 - Board Chassis Location
     *-firmware
          description: BIOS
          vendor: Insyde
          physical id: 0
          version: F.36
          date: 02/02/2015
          size: 128KiB
          capacity: 6080KiB
          capabilities: pci upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb biosbootspecification uefi
         *-cpu
          description: CPU
          product: Core i7 (To Be Filled By O.E.M.)
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz
          serial: To Be Filled By O.E.M.
          slot: U3E1
          size: 2981MHz
          capacity: 3GHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap xsaveopt cpufreq
          configuration: cores=2 enabledcores=2 threads=4

     *-network DISABLED
                description: Wireless interface
                product: RTL8188EE Wireless Network Adapter
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:08:00.0
                logical name: wlo1
                version: 01
                serial: ac:d1:b8:3f:24:d2
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=rtl8188ee driverversion=3.19.5-200.fc21.x86_64 firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
                resources: irq:53 ioport:4000(size=256) memory:c3100000-c3103fff

# 2  
What modules are loaded to deal with this adapter? You may need to rmmod them, modprobe them, and restart the service for that network device.

It may be simply buggy, however. Realtek is at least enthusiastic for linux, but as for actual quality, their drivers are very poor.
This User Gave Thanks to Corona688 For This Post:
# 3  
Quote:
Originally Posted by Corona688
What modules are loaded to deal with this adapter? You may need to rmmod them, modprobe them, and restart the service for that network device.

It may be simply buggy, however. Realtek is at least enthusiastic for linux, but as for actual quality, their drivers are very poor.
Thank you for your reply.

Previously, I had only unsed modprobe for removing and reloading the drivers.
I will try rmmod to see if that uses a different (maybe more thorough) method.
Using modprobe didn't work because the card itself somehow became "disabled" in the suspend process.
I started to wonder if there wasn't something like an internal "wake up" signal that I could send to the adapter, from a terminal,
that would allow the driver reload to be effective.

That is what prompted my post.

This has been on the RedHat bug list for a long time.
I am hoping to find some kind of a workaround until they get it fixed.

Roger
# 4  
Quote:
Originally Posted by RogerBaran
Previously, I had only unsed modprobe for removing and reloading the drivers. I will try rmmod to see if that uses a different (maybe more thorough) method.
Probably not.

Quote:
Using modprobe didn't work because the card itself somehow became "disabled" in the suspend process.
Suspend in linux tends to work badly with buggy drivers.
This User Gave Thanks to Corona688 For This Post:
# 6  
hmmmmm. Definitely. Hadn't thought of that!

---------- Post updated at 03:26 PM ---------- Previous update was at 02:28 PM ----------

I forgot to answer you question about the modules involved...
Code:
root@redbrick /home/redbrick: modprobe -av rtl8188ee
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/net/wireless/cfg80211.ko.xz 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/net/mac80211/mac80211.ko.xz 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/drivers/net/wireless/rtlwifi/rtl8188ee/rtl8188ee.ko

---------- Post updated at 03:38 PM ---------- Previous update was at 03:26 PM ----------

We'll I unloaded the driver stack prior to suspend.
Then I opened the lid of the laptop and ran:
Code:
redbrick@redbrick ~: sudo modprobe -av rtl8188ee
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/net/wireless/cfg80211.ko.xz 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/net/mac80211/mac80211.ko.xz 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko 
insmod /lib/modules/3.19.5-200.fc21.x86_64/kernel/drivers/net/wireless/rtlwifi/rtl8188ee/rtl8188ee.ko 

redbrick@redbrick ~: sudo lshw | grep network
           *-network DISABLED
           *-network

It appears that it is not the driver stack that is causing the card to become disabled...

Maybe it the ACPI??

I did notice that the system log shows a notice that the generic ACPI should be replaced by a proprietary driver if available...

Code:
May 25 15:29:10 redbrick kernel: ACPI Warning: SystemIO range 0x0000000000006040-0x000000000000605f conflicts with OpRegion 0x0000000000006040-0x000000000000604f (\_SB_.PCI0.SBUS.SMBI) (20141107/utaddress-258)
May 25 15:29:10 redbrick kernel: ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver

Thoughts?

Last edited by RogerBaran; 05-25-2015 at 05:56 PM..
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