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#1 2022-08-08 18:10:42

treadful
Member
Registered: 2022-08-08
Posts: 1

X1 Carbon: Not charging status

With a recent update, it seems that charging was essentially broken on my IBM Thinkpad X1 Carbons (two different generations).  I only noticed this wasn't a hardware issue because it happened to two laptops on two different chargers.  It's unclear what the change might have caused this but I did perform some recent package updates which included the kernel and firmware packages.

[2022-08-05T12:53:18-0600] [ALPM] upgraded linux (5.18.7.arch1-1 -> 5.18.16.arch1-1)
[2022-08-05T12:53:18-0600] [ALPM] upgraded linux-firmware-whence (20220610.7b71b75-1 -> 20220708.be7798e-1)
[2022-08-05T12:53:18-0600] [ALPM] upgraded linux-firmware (20220610.7b71b75-1 -> 20220708.be7798e-1)

charge_start_threshold is set to 0, but I don't really think that's the cause.

$ cat /sys/class/power_supply/BAT0/charge_start_threshold
0
$ cat /sys/class/power_supply/BAT0/charge_stop_threshold 
100
$ cat /sys/class/power_supply/BAT0/status 
Not charging

Though I was able to get it it start charging again by explicitly setting `charge_start_threshold`:

# echo "95" > /sys/class/power_supply/BAT0/charge_start_threshold
# cat /sys/class/power_supply/BAT0/charge_start_threshold
95
# cat /sys/class/power_supply/BAT0/status
Charging

On the other laptop, it apparently decided to work correctly again after I powered it down and connected a charger.  For now it seems I'm charging fine on both X1s.  I suppose I'm posting this in case someone else has the same issue or if anyone else has any idea what the root of this problem might be.  Will update if it happens again.

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