Topic: Various Senoko oddities
I'm seeing a combination of a few behaviors with the Senoko board and battery on my Novena laptop making me wonder if I'm seeing one of the known bugs and/or am just screwing something up. Symptoms:
- "shutdown -h now, "sudo systemctl poweroff", etc. sometimes leave the power button lit and unable to reboot without pulling the AC power. Only sometimes though.
- Leaving the AC plugged into the Senoko board on the laptop doesn't actually seem to charge the battery in a way that it can supply the laptop. When I pull the AC power, the laptop dies.
- I already tried (and I think succeeded) in flashing the senoko firmware from 20150504. I had to repeat the exercise several times though. Usually, the update-senoko script's polling would catch when I held down the reflash button on the Senoko board, but releasing the button when instructed would not wake up the tool and let it exit. The whole cycle did work once though, but before and after that, I've tried maybe 10 times.
- Connecting with "sudo screen /dev/ttymxc3 115200" to the battery board has variously reported different things: different statusus of "Charge FET:", "Discharge FET:", and "State:" while plugged in. The last few power cycles though, it's shown me the output at the bottom of the post. Charge level of 0% yet "State: normal discharge" even with the FETs both on. The "Alarms:" at the bottom look disconcerting but then it says "No errors detected" below. After trying the "power up without battery and holding down reflash button" trick, I got a different stats display (the second paste)
Voltage of the cells doesn't look like overdischarge, but I tried commands like those in viewtopic.php?pid=1448#p1448 (forcing a charge of 15 seconds)
I've tried some of the commands thrown around in other posts (like forcing the cell to charge for a few seconds and then putting it back in auto mode) with no luck. I saw mentions of it being possible to fully discharge the battery, but I don't *think* I've run it very long off the battery. I've tried pulling all 4(?) connections I saw between the battery and the board and plugging them back a few minutes later. I've tried "gg it" and "gg pfreset".
Two other potentially unrelated problems, but just in case they matter:
- (Do I just need to insert an SD card with a recovery image?) Holding down user button doesn't start any sort of recovery program when powering up.
- The LCD sometimes looks fuzzy and the color palette weird. Kind of like the screenshot in http://www.kosagi.com/forums/viewtopic. … 486#p1486. I tried the steps from the following post which seems to have helped but not eliminated the problem. (The LCD backlight is also bleeding a bunch, and actually has been developing new spots, but I assume that's even more unrelated.)
Manufacturer: Texas Inst. Part name: bq20z95 Firmware version: 0x150 Charge FET: on Discharge FET: on State: normal discharge Time until full: 65535 minutes Time until empty: 65535 minutes Chemistry: LION Serial number: 0x0001 Cycle count: 1 Battery health: 98% Charge: 0% Max capacity: 4865 mAh Design capacity: 5000 mAh Temperature: 28.4 C Voltage: 12142 mV Current: 0 mA Average current: 0 mA Target voltage: 12600 mV Target current: 5000 mA Number of cells: 3 cells Cell 1 voltage: 4026 mV Cell 2 voltage: 4071 mV Cell 3 voltage: 4044 mV Cell 4 voltage: 0 mV Charge status: 0x200 Charging allowed? yes Can suspend? no Can precharge? no Can maintenance? no Temperature limit? no Temperature limit? no Can fastcharge? yes Pulse charging? no Pulse disable CHG? no Cell balancing? no Precharge timeout? no Fastcharge timeout? no Overcharge OV? no Overcharge OC? no Overcharge? no Battery empty? no Alarms: TERMINATE DISCHARGE ALARM REMAINING CAPACITY ALARM Charge state: Battery initialized Battery discharging/relaxing Battery fully discharged No errors detected No safety alerts No safety status messages