My laptop is Lenovo X201 with a RTL8191SEvB wireless card. In kernel 2.6.3x version, I’ve to install the rtl8192se and rtl8192se-firmware packages to make it works. In the previous settings, the module named r8192se_pci and with a parameter hwwep=0 can led to a stable network connection no matter my gentoo or ubuntu box.
But the nightmare comes back when I upgrade to kernel-3.0.x with built-in rtl8192se modules in rtlwifi catalog. The issues are:
1) Network connection are hard to established and will disconnected dynamically itself.
2) My ad-hoc connection shared by Windows cannot be established.
3) And so on.
The symptoms of the issues are: the configurations via ifconfig, iwconfig even route are all CORRECTLY, but I still CANNOT ping the default gateway.
But now I found a PARTIAL solution. That is, to set a new parameter swenc=1 to make the module use software encryption rather than hardware one, which similar the old hwwep=0 with r8192se_pci modules.
To make it set on loaded, adding a configuration file via:
echo "options rtl8192se swenc=1" > /etc/modprobe.d/rtl8192se.conf
If you encounter the same problem with rtl8192se driver on RTL8191SEvB card, Try it. 🙂
[20111114 edit] From the forum, the developer suggest me to install iw and set the CRDA for the wirless card. After I try
# iw reg set TW, my network connection in Ubuntu more stable. Maybe this is another trick, too.