On Fri, Jul 31, 2015 at 8:06 AM, Arun K. Singh <arunkat@xxxxxxxxx> wrote: > Hi Jakub, > >>> Checking adapter.c, adapter->no_scan_restart_delay parameter looks >>> promising if set to true. Still same result - next scan delay ~ 2 sec. >>> Not sure if such delay is intentional or platform performance related >>> My question is :- Is there a neat way to trigger continuous active LE >>> scan even though it may sound power-wise inefficient. Tried to grep >>> archives but couldn't find much help. >> So there is something like that, but you'll probably have to update >> your kernel (I think this feature is all in 4.0, or 4.1) >> Recently kernel patch landed that enables simultaneous discovery, but >> that works only for some controllers, you'll have to check wether your >> controller have this quirk set: HCI_QUIRK_SIMULTANEOUS_DISCOVERY >> http://git.kernel.org/cgit/linux/kernel/git/bluetooth/bluetooth-next.git/tree/include/net/bluetooth/hci.h#n164 >> What this does is: previously there was 5s le scan, then 5s classic >> scan, then 5s break, now it's simulteanous le and br/edr scan. > > Thanks for the insight. But I am more interested in reducing the 5s > break aka IDLE_DISCOV_TIMEOUT to zero. > It is when I reduce this to zero or set adapter->no_scan_restart_delay > parameter to True that I still find few > seconds delay to restart scan. I have taken care of interleaved stuff > by setting my device to "le" only in main.conf. > So all my scans are "le only" for 10 seconds. Do you think it is > entire possible to make scan continuous for say a minute' > without any restart delay. It sounds like a bug, maybe something platform or controller dependent. It's working fine for me now on x64 platform with intel or CSR controllers and latest kernel. Can you try running bluetoothd with -nd flags (show debugging output + stay running in console) to gather some logs ? Also runing monitor/btmon at same time might be useful to see what's going to controller. > > Thanks, > Arun -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
