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WLAN card drops while switching power

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Forgive my poor English, please.

My laptop model: Samsung R428, CPU: T4400 2.2MHz, Wireless: Atheros AR9285

I installed Lion 10.7.5 with chameleon boot. To drive my AR9285, I modified the S/L/E/IO80211Family.kext, find AirportAtheros21.kext&AirportAtheros40.kext, patched the device id from 168c,2a to 168c,2b. Everything seems OK.

But the problem I found then: When I switched the power of my laptop, from AC to battery or from battery to AC, the wireless connection broke in a few seconds while the WLAN icon changed into grey. The connection can't be restored unless reboot the system.

I guess the problem caused by power management, so I patched the DSDT file to make AppleInterCPUPowermanagement work. The problem remains.

Any comments? Thanks again.

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