Hi all,
Days ago the coreboot port for Thinkpad X230s (
https://review.coreboot.org/c/coreboot/+/41390 ) for one of my friends got
merged. Most stuffs on this laptop proves to work fine, but the interaction
between its EC and cellular modem installed in its internal M.2 socket is
detected to be a bit weird, and because of this the cellular modem installed
internally becomes hardly usable:
If the laptop is connected to AC power, the cellular modem is disabled and
cannot be enabled with software. (e.g. Modem manager ) as if there were a
hardware switch set to flight mode; if the AC power is absent, whether the
cellular modem is usable depends on the operating system.
The detailed testing result table collected by my friend is attached, in html
format.
The direct cause of this phenomenon may be that the EC erroneously pull down
the GPIO pin for rfkill (Pin 8 of the M.2 socket with key B) when the AC power
gets present, but I cannot confirm whether the main board of this X230s is
faulty, or the EC firmware is buggy, or the EC of X230s should be treated
differently as the EC of X230, which I did not implement in my work.
Currently, this problem is walked around by blocking the Pin with a small piece
of insulating tape.
Since I have experienced only one X230s, I cannot tell which one is the real
case. Could ye help me to confirm and/or improve this if ye have a chance to
access your own Thinkpad X230s?
Regards,
Persmule
| Debian testing/unstable |
5.7 |
Y |
- |
N |
N |
Y (require firmware) |
| Fedora 32 |
5.6 |
N |
N |
N |
N |
Y |
| Mint 20 |
5.4 |
Y |
- |
N |
N |
Y |
| Debian 10.04 |
4.19 |
N |
Y |
N |
N |
Y (require firmware) |
| PureOS 9 (2020-03) |
4.19 |
N |
N |
N |
N |
Y (require firmware) |
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