**** BEGIN LOGGING AT Fri Jun 25 02:59:57 2010 Jun 25 05:56:28 gena2x: http://www.mail-archive.com/openmoko-kernel@lists.openmoko.org/msg01538.html Jun 25 08:26:12 PaulFertser: I've finally found that: http://lists.openmoko.org/pipermail/openmoko-kernel/2008-March/001939.html . i am bad i termins - EMI were mentioned in mails. i reverted this patch - but got no effect at all (not on flickering, not on touchscreen). Jun 25 17:57:39 is opkg upgrade working at the moment for shr-u? Jun 25 17:57:58 u.29 Jun 25 18:02:47 not Jun 25 18:07:20 ok Jun 25 18:13:51 JaMa: 1:48.5, 50 km, got nowhere, met nobody, gained nothing Jun 25 18:40:30 PaulFertser: good time again, I should reconsider bike trip with you, avg > 25 would kill me now :) Jun 25 18:42:03 max_posedon: did you try to upgrade from shr-unstable.29 (mesa-dri and libx11)? Jun 25 18:42:27 PaulFertser: hi, Paul. may be you know - did anyone tried to do digital filtering of mic gsm noise? Jun 25 18:43:16 PaulFertser: i mean, record from mic, ADC digitally filter, DAC, and push back to gsm? Jun 25 18:43:24 JaMa: hehe Jun 25 18:44:03 gena2x: i understand what you say, but i'm not sure anyone tried. If you mean that as a way to solve the buzz issue, i'd recommend to not waste your time. Jun 25 18:44:15 (imho) Jun 25 18:44:16 PaulFertser: why? Jun 25 18:45:14 PaulFertser: i just tried to record noise (btw, i don't understand how this noise is filtered by single cap), i tried to push pcm sound into line Jun 25 18:45:35 PaulFertser: all ok, pushed sound have good quality, low cpu load. Jun 25 18:45:42 PaulFertser: so, why not? Jun 25 18:45:56 PaulFertser: only thing to find is digital filter. Jun 25 18:45:58 gena2x: i think you can't really filter the noise. Jun 25 18:46:16 gena2x: because it's not stable, and very loud. Jun 25 18:46:40 PaulFertser: hm. did you do digital recording of that noise? Jun 25 18:46:52 gena2x: no, tbh Jun 25 18:47:12 gena2x: the cap does filter the noise by eliminating _any_ signal. Jun 25 18:47:36 PaulFertser: i recorded, i see exatly similar noise as i hear then i bring phone near speakers. Jun 25 18:47:48 gena2x: did you manage to filter it? Jun 25 18:48:13 JaMa, nope Failed to download http://build.shr-project.org/shr-unstable/ipk//all/Packages.gz: HTTP response code said error. Jun 25 18:48:17 it look like periodical Jun 25 18:48:27 max_posedon: tests/shr-unstable.29 Jun 25 18:48:33 PaulFertser: i can send you mp3. Jun 25 18:48:39 with small sample Jun 25 18:48:54 max_posedon: I've removed shr-unstable/ipk after your report Jun 25 18:50:01 ok, opkg update. let me try Jun 25 18:50:05 gena2x: i know nothing about filtering, so i can't really judge. It's my gut feeling you can't get any good quality with that. Moreover the idea to fix the bug the wrong way sounds strange to me. Jun 25 18:50:40 PaulFertser: i cant decide it i did buzzfix well. Jun 25 18:50:46 *if Jun 25 18:50:51 how to check that? Jun 25 18:51:19 i think my noise may be noise with buzzfix. Jun 25 18:51:39 as as far as i can recall, without my 'fix' sound were worse. Jun 25 18:51:47 how to check if buzzfix applied well? Jun 25 18:52:13 can you do small recording of call in progress to compare? Jun 25 18:52:39 i can send state file Jun 25 18:52:54 to have similar states. Jun 25 18:53:10 gena2x: hm... To determine if the buzzfix is good, you can measure the capacitance between the mic pin and the ground. And there should be 2.2 k resistance there as well. Jun 25 18:53:50 gena2x: buzz is very dependent upon evironment, i didn't get any complaints until i was at my granny's away from moscow. Jun 25 18:54:17 hm. ok. Jun 25 18:54:54 just as far as i can understand electronics, capacitor may cut something above of below some frequency. Jun 25 18:55:39 but as i hear my buzz, it hav quite wide spectrum Jun 25 18:55:51 do i have right understanding? Jun 25 18:56:25 i'll do fuirier for it now... Jun 25 18:56:50 JaMa, mesa-dri == mesa? Jun 25 18:57:07 or xserver-xorg-extension-dri2 ? Jun 25 18:57:37 http://paste.pocoo.org/show/229940/ Jun 25 18:57:44 PaulFertser: so, i wonder, how it's possible to cut this noise with cap (and why impossible with digital filter)? Jun 25 18:57:57 gena2x: well, the RC filter implemented should cut all the frequencies you hear damn well. Jun 25 18:58:07 gena2x: the mic has to terminals Jun 25 18:58:12 i mean, if it is possible with cap, it should be easy with digital filter. Jun 25 18:58:15 gena2x: one gets buzz Jun 25 18:58:28 gena2x: you just "bind" that one to a stable voltage source with the cap. Jun 25 18:58:34 gena2x: and get signal only from the other. Jun 25 18:59:18 ok, huge thanks for description. Jun 25 19:00:03 max_posedon: every mesa-dri installed package: http://paste.pocoo.org/show/229736/ Jun 25 19:04:28 PaulFertser: is the sound after buzzfix should be clear at any volume? Jun 25 19:05:32 PaulFertser: i am not meaning it should be free from dictortion from overamplification, but before that limit? Jun 25 19:05:34 gena2x: if you do not overload the sound amplification chain anywhere, i hope so. Jun 25 19:05:45 gena2x: i can't tell for sure. Jun 25 19:06:13 PaulFertser: hm. you have buzzfix? do you still have some noises? Jun 25 19:06:50 gena2x: i had no complaints about gsm buzz... Jun 25 19:07:17 PaulFertser: btw, my current noise DO NOT sound like gsm buzz on other side Jun 25 19:07:38 PaulFertser: it sounds more like white noise Jun 25 19:08:16 PaulFertser: but if i start recoding mic2 directly, i hear absolutely clear gsm noise. Jun 25 19:08:50 PaulFertser: so, don't you know - do you still have something like white noise? Jun 25 19:09:13 gena2x: when i tried it, and i do not say anything, the calypso cuts off the sound. Jun 25 19:10:03 PaulFertser: ok, thanks. Jun 25 19:11:35 gena2x: sorry, i'm not currently very concentrated Jun 25 19:12:16 PaulFertser: i understand, after 50km at friday, i always want to relax too :) Jun 25 19:12:38 gena2x: not that tired but frustrated :/ Jun 25 19:14:29 Hey. I just installed shr-u from scratch, I've been waiting some 20 minutes but X won't start. Should I keep waiting or should I restart ir?, pls Jun 25 19:15:38 ftn: where did you get the image? and have you read shr ML today? Jun 25 19:16:16 JaMa http://build.shr-project.org/shr-unstable.29/images/om-gta02/shr-lite-eglibc-ipk--20100625-om-gta02.rootfs.tar.gz Jun 25 19:16:48 JaMa I read the ML but I haven't upgraded or anything, I just formated the partition and uncompressed the file Jun 25 19:16:51 ftn: then don't wait anymore and read ML Jun 25 19:17:18 ftn: you need 2.6.3* kernel too, because image also contains that upgraded stuff Jun 25 19:18:26 ftn: and it's not best occasion to reflash, because tomorrow or in few more days there will be completely new images Jun 25 19:20:43 JaMa: based on .3*? Jun 25 19:21:05 undrwater: ? Jun 25 19:21:20 JaMa: congratulations with moving to 3* kernel. hope this accident will make shr users happier :) Jun 25 19:22:23 JaMa: yes...kernel 2.6.3* just read the ML...this shr user happy :) Jun 25 19:22:30 gena2x: well It wasn't me :) but I also hope that this accident will be actually fortunate in the end :) Jun 25 19:23:28 ah images based on .3.. :) I didn't understand what you mean first Jun 25 19:24:00 <--just being finger lazy.... Jun 25 19:25:55 so...we should see positive change by monday? Jun 25 19:26:26 it depends on shr buildhost speed.. it will merely finish by monday.. Jun 25 19:26:34 * JaMa has shr-unstable.29 running again Jun 25 19:28:15 ok...i will remain patient...i think Jun 25 19:29:00 can anyone with or without buzzfix do small recording for me? Jun 25 19:29:13 pleeease :) Jun 25 19:29:19 better without :) Jun 25 19:29:31 JaMa alright then, thanks for your tips Jun 25 19:29:40 not better, but in fact someone without. Jun 25 19:36:30 * JaMa has buzz fix.. Jun 25 19:37:20 oh, i already found wavs with samples of gsmbuzz :) Jun 25 19:37:47 why not use vuvuzela instead? :) Jun 25 19:38:03 damn. my buzz is true different. Jun 25 19:38:05 if you need annoying samples of buzz :) Jun 25 19:38:16 grr Jun 25 19:38:36 :) Jun 25 20:00:20 soo...anyone tested tangogps 0.99.4 on SHR yet? Jun 25 20:38:08 * gena2x going to disassemble fr and resolder buzzfix Jun 25 20:38:19 * gena2x is praying electronic god Jun 25 20:39:47 * gena2x "god, save my lcd, mic and fr" Jun 25 20:50:01 * JaMa has ipk for tangogps 0.99.4 if there is someone interested.. Jun 25 20:54:04 Wow, my cap sohow got desoldered :(((( Jun 25 20:54:15 s/sohow/somehow Jun 25 20:54:42 really, pin is broken. Jun 25 20:54:55 anything is clean about my buzz :( Jun 25 20:55:53 no rohs this time. Jun 25 21:11:47 gena2x: which side of the cap got desoldered? Jun 25 21:12:20 in fact, it's not desoldered. it's broken Jun 25 21:12:51 gena2x: probably the cap was too far away from the board and that allowed it to wiggle. Jun 25 21:12:54 so soldering still at place, and it will be easier to solder new one i hope. Jun 25 21:14:09 no, this seem because of my method - i amm. burved it to opposite direction Jun 25 21:14:15 *curved Jun 25 21:14:42 this seem were bad idea for small component Jun 25 21:14:53 gena2x: yeah, sometimes it's better to do like the herd does :) Jun 25 21:15:40 may be i'll also find place to new backup battery Jun 25 21:15:58 (i found only big cr1620. Jun 25 21:16:40 gena2x: you can consider using the "embedded air" area (filled with big white silly) and routing with wires. Jun 25 21:17:10 but worst task seem to find that small caps :) Jun 25 21:17:45 yeah. i hope such degree of dissemble will not break fix you did :( Jun 25 21:18:25 gena2x: shouldn't, those were pretty sturdy, i hope Jun 25 22:42:28 lets view some pics:) Jun 25 23:38:54 booldy hell, i prefer not to do this again, even if someone pay me. Jun 25 23:39:31 all, have nice dreams/day, i have buzzfix now :)\ **** ENDING LOGGING AT Sat Jun 26 02:59:57 2010