Hi Dalton, On Wed, Jun 10, 2015 at 03:30:32AM +0530, Dalton Fury wrote: > [1.] [Sony VAIO SVF14212SNB] Can't change usb_charge attribute in > /sys/devices/platform/sony-laptop > > [2.] I am on a Sony VAIO svf43142sn. My laptop has the ability to ... > echo -n 0 | sudo tee -a /sys/devices/platform/sony-laptop/usb_charge > > these are the curresponding kernel log entries: > > [ 495.400140] sony_laptop: found handle 0x0155 (offset: 0x07) > [ 495.400955] sony_laptop: __call_snc_method: [SN07:0x0000000000000107] > [ 495.400961] sony_laptop: called SN07 with 0x0107 (result: 0x0000) > > After attempting to change, and when I cat the value of usb_charge, I > find that it is unchanged. But when the cat cammand is executed, I get > these kernel messages: > > [ 683.170315] sony_laptop: found handle 0x0155 (offset: 0x07) > [ 683.170458] sony_laptop: __call_snc_method: [SN07:0x0000000000000007] > [ 683.170462] sony_laptop: called SN07 with 0x0007 (result: 0x0001) I have the same behaviour on my laptop (a Pro11), I believe usb_charge was working correctly sometime in the past. It may take me some time but I should be able to take a look. In the meantime it would be good if you could attach the DSDT from your model to the Ubuntu bug report and send a link here too. > I don't know if it is relevent, but for writing this bug report, when > I booted into the latest upstream kernel, I could not boot. The second > time it booted successfully. I don't think it is. Thanks -- mattia :wq! -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
