**** BEGIN LOGGING AT Wed Apr 17 02:59:59 2013 Apr 17 04:34:34 hi guys, I wanna to learn arm, is there some place I can go from there, such as newbie tutorial Apr 17 04:34:47 thanks Apr 17 05:08:40 jenenliu: best way to learn is to figure out a goal, something real that you want to achieve. And then start doing it. It's not really efficient to just "learn arm". Apr 17 05:21:01 kulve: thanks Apr 17 09:22:30 hi Apr 17 09:23:30 this documentation https://wiki.ubuntu.com/Nexus7/UsingTheDevice states under Attaching a USB Device to the Nexus 7 -> There is no way to charge the device while it is connected to the OTG cable. why? Apr 17 09:24:46 with the OTG cable the device is the USB host, so it's giving power out through the USB cable. Where would it take power in for charging? Apr 17 09:27:01 rnix: grab cheap chinese powered hub, connect it to OTG and check what will happen Apr 17 09:27:38 <[mbm]> https://bugs.launchpad.net/ubuntu-nexus7/+bug/1072320 Apr 17 09:27:39 Launchpad bug 1072320 in ubuntu-nexus7 "please consider adding OTG charging support to kernel" [High,In progress] Apr 17 09:28:51 so if i build something like this -> http://www.instructables.com/files/deriv/FDR/71ZI/GINP15VZ/FDR71ZIGINP15VZ.LARGE.jpg -> and connect to a usb hub it might work? Apr 17 09:29:19 <[mbm]> but basically kulve is right; otg doesn't really provide a way to charge, the above is just a driver hack Apr 17 09:30:14 <[mbm]> rnix: yes, a combination of that and a patched driver Apr 17 09:35:40 thx Apr 17 09:38:25 and that driver hack makes the USB driver hardlock ... thats why we dropped it again (after testing it) Apr 17 09:40:17 <[mbm]> I'd be a bit scared of accidentally having both the nexus and the external power active at the same time Apr 17 09:41:58 heh Apr 17 09:49:40 ogra_: what do you mean with "makes the USB driver hardlock" ? Apr 17 09:50:18 rnix, you can charge but not use any devices Apr 17 09:50:34 which kind of defeats the purpose :) Apr 17 09:51:09 hmpf, true Apr 17 09:51:10 <[mbm]> not entirely surprising when hacking the usb controller into undefined modes Apr 17 09:51:11 and since that image most likely will die anyway in favour of ubuntu touch there is nobody actuvely looking into that bug Apr 17 09:51:23 *actively Apr 17 09:51:48 <[mbm]> they gave up on the full desktop experience? Apr 17 09:52:35 no, but the desktop will be replaced by unity next and mir Apr 17 09:52:45 which esssentially is ubuntu touch :) Apr 17 09:53:48 <[mbm]> long as there's an x11 compatibility layer I suppose Apr 17 09:54:00 there isnt atm Apr 17 09:54:13 ogra_: just to understand right -> what i want to do is connect a serial port (to write to, via /dev/ttyUSB[n]) while charging. and this is not supported and never will be? Apr 17 09:54:15 there will be once the desktop gets replaced Apr 17 09:54:34 rnix, right Apr 17 09:54:59 i wouldnbt say "never" but it isnt any priority (not even low) Apr 17 09:55:03 <[mbm]> rnix: officially, when your device is controlling a perhiperal (like your serial dongle) it's in usb host mode and is supplying +5v out of the usb port Apr 17 09:55:26 ubuntu touch uses adb all over the place so even serial support is questionable Apr 17 09:55:53 <[mbm]> rnix: to do charging you have to hack the usb driver not to switch on the 5v output and instead take 5v as a charge input Apr 17 09:56:06 ogra_: well, it already works if i connect my serial adapter to the otg cable Apr 17 09:56:14 but without charging Apr 17 09:56:29 yes it works in this image ... Apr 17 09:56:39 it wont/doesnt work in ubuntu touch Apr 17 09:57:07 since the gadget is claimed by adb so you cant load the serial gadget driver in parallel Apr 17 09:57:10 ok, and ubuntu touch will replace the patced 13.04 image for n7 in future? Apr 17 09:57:41 <[mbm]> (hacking the usb driver, as described above makes it prone to crashing) Apr 17 09:58:03 rnix, most likely ... it isnt decided yet Apr 17 09:58:25 we need *one* classic desktop image to test apps on until the desktop did get replaced Apr 17 09:58:41 its not clear if that will just be the pandaboard image or probably the nexus7 one Apr 17 09:59:25 but given that we dont want to maintain two n7 kernels and given that they need to differ between the two images its likely to go away if it turns out we cant use the same kernel on both images Apr 17 10:06:33 finally all i can do is either use a bluetooth or wireless bright to my bus or hack the hardware with an external power supply instead of battery. latter one makes the ose of a tablet obsolete... Apr 17 10:06:45 s/bright/bridge Apr 17 10:07:49 you could use your own patched kernel (and fix the issue alongside) Apr 17 10:07:58 hi all. Login takes time as wifi interface is not up correctly. It is defined as dhcp, but I have an ipression that udhcpc is not started. How to verify this? Apr 17 10:13:57 hi all. Login takes time as wifi interface is not up correctly. It is defined as dhcp, but I have an ipression that udhcpc is not started. How to verify this? Apr 17 10:15:15 !ask Apr 17 10:15:18 Please don't ask to ask a question, simply ask the question (all on ONE line and in the channel, so that others can read and follow it easily). If anyone knows the answer they will most likely reply. :-) See also !patience Apr 17 10:15:25 !patience Apr 17 10:15:25 Don't feel ignored and repeat your question quickly; if nobody knows your answer, nobody will answer you. While you wait, try searching https://help.ubuntu.com/ or http://ubuntuforums.org/ or http://askubuntu.com/ Apr 17 10:19:20 ..oO( same in every tech channel ;) ).. Apr 17 10:19:33 actually, look at the list of open bugs instead Apr 17 10:20:15 same with every oss project ;) Apr 17 11:16:20 would it be possible to load via docking station while using micro usb to write? Apr 17 11:16:42 * ogra_ has never seen an n7 docking station ... Apr 17 11:16:56 i would assume not though ... it will likely claim the usb port for charging Apr 17 11:17:47 http://www.blogcdn.com/www.engadget.com/media/2013/01/nexus-7-dock.jpg Apr 17 11:18:21 well, that's what i fear as well - xor usage Apr 17 11:19:00 it wont change the kernel or driver ... so it will likely do the same ... **** ENDING LOGGING AT Thu Apr 18 02:59:58 2013