2022-04-21.log

_Eminute: alright, I'll get in touch00:05
_Eif there's anything else you'd like me to try while I have the board, I'm not opposed to poking around00:06
_Ethough I don't have any precision soldering/rework equipment, so repair is probably out of the question00:09
minute_E: with the ohmmeter in the multimeter, you could measure the resistance to GND of each power rail (with nothing connected)00:10
minutehmm, i'm running "foot" instead of xfce4-terminal for a few days and i must say, it feels substantially faster00:10
khmI miss xfce4-terminal's multiline paste confirmation but I use foot too00:21
khm(I don't have xwayland enabled or installed at all)00:21
minuteah yeah00:23
minutealso, i'm trying newer mesa+xwayland versions and glamor triggers some nasty GPU problems again00:24
minuteXWAYLAND_NO_GLAMOR and kicad runs fine00:24
khmall I really miss is accelerated firefox00:24
minuteyeah, i feel that00:25
minuteit's a shame they don't properly support GLES200:25
khmI use this to test:  https://mfx.drastic.net/view/tigris/  (not recommended without accelerated graphics)00:27
_Eminute: checked every net with a V in its name (or PWR), no apparent connectivity to ground00:39
_Eso either the resistance was too high for my multimeter to consider connectivity-beep-worthy, or none of them are shorted without power00:41
minute_E: well, that's good at least00:53
_Eminute: I'm gonna try hooking my scope up to LPC_VCC00:57
_EI doubt it'll show anything interesting, but maybe having some idea of the timing could lead somewhere00:58
minutesure01:05
_Enothing super exciting, looks like it's alive for about 400ms before the power supply's overcurrent protection shuts it off01:10
_Ewell, "alive" might be a strong word for it01:10
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svpminute: i didnt feel particularly comfortable soldering so close to the keyboard switches so i carefully used tape near R3, resetting DOES work now.14:29
svpstill, further inspecting with showkey shows two rows and one column of keys not being detected, however (first column, F-key row and home row, to be precise)14:32
minutesvp: hmm that's not so good... 14:34
C-KeenI wonder what has happened to your unit14:55
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svpvoltage between COL1 and ROW1 is low, same for all of column 1 and row 1 as a whole while every other combination on any other lane is a steady 0V5. measuring from switch pad with the label close and the diode's end on the same side. i would suspect the esc key might be involved but the switch works fine... yeah i'm pretty lost on this one16:41
minutesvp: hmmmm, mcu damaged somehow?16:51
svpstarting to suspect as such. it might be because of the issue i was told about last night, with the pins, but i thought this was no longer an issue by now. my model is a DIY #000235, would it mean the issue persisted?17:04
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reform18165users17:12
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minutesvp: normally it should not have persisted... we also had one bad MCU in the lab (unknown reasons). which country are you in? 18:01
svpI'm in Italy18:01
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minutesvp: i would suggest you send us the keyboard for fixing then18:09
+ Nulo (~Nulo@user/nulo)18:10
minutesvp: send it (just the keyboard) to our address on the bottom of mntre.com, with trackable package (important!) and send the tracking details etc to support@mntre.com18:10
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svpalright, will do.18:43
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_Eminute: if I'm going to be sending stuff in for repair, would it be worth checking the peripherals for damage as well?20:38
minute_E: well, it might make sense to send motherboard + keyboard yeah20:39
_Ewould it be safe to apply power to the keyboard/trackball without the data pins connected to anything?20:46
_Econsidering how severely the rest of the board was affected, I'd guess they're probably fine if they still boot20:47
minutethat would be safe yep, just make sure it's the correct voltages ^^20:51
_Elooks like the trackball survived21:03
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+ Nulo (~Nulo@user/nulo)21:08
_Eminute: both the keyboard and trackball booted back up21:11
_Ewish there was a way to test the other peripherals, but I don't think I can suitably wire up a fake pcie bus or sodimm slot21:13
_Eor display21:13
_E...unless someone wants to share some verilog for lattice fpga boards21:15
minute_E: pretty sure the problem is local to the motherboard21:21
_Emakes sense21:33
_Eminute: call me paranoid, but since it's a failure in the power supply circuitry, I wanted to see if it had fried anything downstream21:34
minute_E: yep, good call21:36
+ MajorBiscuit (~MajorBisc@86-88-79-148.fixed.kpn.net)21:36
_Ethis isn't relevant to the power issue, but I do wanna say21:36
_EI think the assembly instructions should do the keyboard/oled before the motherboard21:37
_Edoing the motherboard first exposes the display to damage from dropped parts21:37
_Ehaving the keyboard in place would mitigate that a fair deal21:38
minuteinteresting!21:38
_Ealternatively, you could have them unfold the device as step 121:39
_Eyou can thank a near-miss with a screwdriver for the insight21:40
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