Hello Oliver, >>> Are there any settings that controls the transmission power under Linux >>> for the 3G-Modem, or is this device a "black box"? >> It might be possible with AT commands. Please try using >> cpufreq to lower your CPU's speed and test again. > > In the meantime i have seen also this crash effect with power supply > plugged in. > > CPUFREQ should be already active > [...] in the meantime I have send my Laptop back zu Acer and at the hotline i had demanded to renew the 3G-Modem. So i got it back last week with an new Modem, and now my System is running absolutely stable about a week. Thanks a lot for your help and sorry for the confusion i made ;). Regards, Patrick -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html