Red Hat Bugzilla – Bug 815870
Realtek RTL8188CE: dont get full list of all access points
Last modified: 2012-11-14 10:17:51 EST
Created attachment 579928 [details]
The kernel-3.3.2-1 with only an access point
Description of problem:
I have a HP MINI 110-3700LA with the update i have to be more close of an access point to get the net listed on NetworkManager and the problem came with the kernel-3.3.2-1.fc16.i686 must be a problem with the module rtl8192ce, is like
the the wireless ratio is lower with the kernel-3.3.2-1.
The Last kernel that worked fine was kernel-3.3.1-3.fc16.i686, i took some pics of this problem, and like the kernel kernel-3.3.1-3.fc16.i686 is not on repos i had to install an older kernel(3.2.1-3.fc16.i686).
[wesker@FedoraUmbrella ~]$ lspci | grep RTL
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
802.11b/g/n WiFi Adapter (rev 01)
With both kernel the module run without problems
[wesker@FedoraUmbrella ~]$ lsmod | grep rtl
rtl8192ce 74359 0
rtl8192c_common 66124 1 rtl8192ce
rtlwifi 93506 1 rtl8192ce
mac80211 264069 3 rtl8192ce,rtl8192c_common,rtlwifi
cfg80211 164857 2 rtlwifi,mac80211
Created attachment 579936 [details]
An older kernel(3.2.1-3.fc16.i686) with a lot access point listed, the laptop is on the same place
From Jorge in email:
> the last kernel that worked fine was 3.3.1-3.fc16.i686
FWIW, this patch was applied in between 3.3.1 and 3.3.2:
Author: Larry Finger <Larry.Finger@lwfinger.net>
Date: Mon Mar 26 09:59:48 2012 -0500
rtlwifi: rtl8192ce: rtl8192cu: rtl8192de: Fix low-gain setting when scanning
commit 643c61e119459e9d750087b7b34be94491efebf9 upstream.
In https://bugzilla.redhat.com/show_bug.cgi?id=770207, slowdowns of driver
rtl8192ce are reported. One fix (commit a9b89e2) has already been applied,
and it helped, but the maximum RX speed would still drop to 1 Mbps. As in
the previous fix, the initial gain was determined to be the problem; however
the problem arises from a setting of the gain when scans are started.
Driver rtl8192de also has the same code structure - this one is fixed as wel
Reported-and-Tested-by: Ivan Pesin <firstname.lastname@example.org>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <email@example.com>
Signed-off-by: Greg Kroah-Hartman <firstname.lastname@example.org>
Test kernels with that patch reverted are building here:
When they finish building, please give them a try and post the results here -- thanks!
sorry for the delay, i tested the kernel with patch reverted and is working very fine, i get all wireless networks and i can connect without problems.
By the way, this patch reverting not affect this fix https://bugzilla.redhat.com/show_bug.cgi?id=770207?
Created attachment 580245 [details]
Wireless connection with patch reverted kernel
Hopefully Larry will come through with a new fix that let's us keep the fix for 770207 as well...?
(In reply to comment #6)
> Hopefully Larry will come through with a new fix that let's us keep the fix
> for 770207 as well...?
i got a solution but i dont think that it work for 770207
- kernel-devel or kernel-pae-devel
1) Download the source code from realtek
2) Compile the driver
-- we will get 2 files rtlwifi.ko and rtl8192ce.ko
3) rename or delete this files
# /lib/modules/´uname -r´/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko
# /lib/modules/´uname -r´/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko
4) copy the compiled driver to modules
# cp /home/´whoami´/rtl_92ce_92se_92de_linux_mac80211_0005.1230.2011/rtlwifi.ko /lib/modules/´uname -r´/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko
# cp /home/´whoami´/rtl_92ce_92se_92de_linux_mac80211_0005.1230.2011/rtl8192ce/rtl8182ce.ko /lib/modules/´uname -r´/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko
5) restart or use insmod
# insmod rtlwifi
# insmod rtl8192ce.ko
This was tested on Fedora 17
John, Larry, Jorge, was this ever resolved?
# Mass update to all open bugs.
Kernel 3.6.2-1.fc16 has just been pushed to updates.
This update is a significant rebase from the previous version.
Please retest with this kernel, and let us know if your problem has been fixed.
In the event that you have upgraded to a newer release and the bug you reported
is still present, please change the version field to the newest release you have
encountered the issue with. Before doing so, please ensure you are testing the
latest kernel update in that release and attach any new and relevant information
you may have gathered.
If you are not the original bug reporter and you still experience this bug,
please file a new report, as it is possible that you may be seeing a
(Please don't clone this bug, a fresh bug referencing this bug in the comment is sufficient).
With no response, we are closing this bug under the assumption that it is no longer an issue. If you still experience this bug, please feel free to reopen the bug report.