I have a very similar issue as Jonathan described with my wireless card - also a RTL8192. Interestingly, lockups only occur on certain wireless networks (e.g. EAP Type: PEAP; Network Authentication: WPAWPA2; Data Encryption: TKIP/AES; Authentication Method/Protocol: MSCHAP-V2; Inner EAP Type: EAP-MSCHAPv2), other connections (e.g. home networks) appear to work better (albeit not completely flawlessly). Both standard 64bit 2.6.32 kernel and lucid 2.6.34-020634-generic are affected. My current workaround is to disable the wireless card by its hardware switch.
I have a very similar issue as Jonathan described with my wireless card - also a RTL8192. Interestingly, lockups only occur on certain wireless networks (e.g. EAP Type: PEAP; Network Authentication: WPAWPA2; Data Encryption: TKIP/AES; Authentication Method/Protocol: MSCHAP-V2; Inner EAP Type: EAP-MSCHAPv2), other connections (e.g. home networks) appear to work better (albeit not completely flawlessly). Both standard 64bit 2.6.32 kernel and lucid 2.6.34- 020634- generic are affected. My current workaround is to disable the wireless card by its hardware switch.