Thanks,
yes, didn't have ic2-dev in .config (had looked for I2C_DEV):
# CONFIG_I2C_CHARDEV is not set
And you are right: i7-8550U has got of course only 4 cores (8 threads
which are shown as 8 CPUs in /proc/cpuinfo as well as in monitor).
I guess it has been in some older Lenovos that thinkpad-isa-0000 showed
cores temps.
Pekka
On 2/8/19 11:54 AM, Ondřej Lysoněk wrote:
Hi,
On 08. 02. 19 1:23, Pekka Sarnila wrote:
Lenovo T580: i7-8550U
Debian Buster
Kernel 4.3.12 (static), .config:
----------------------------------
...
CONFIG_I2C_SMBUS=y
CONFIG_I2C_ALGOBIT=y
...
CONFIG_I2C_I801=y
...
----------------------------------
lspci -v
-------------------------------------------------------------
...
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
Subsystem: Lenovo Sunrise Point-LP SMBus
Flags: medium devsel, IRQ 16
Memory at ed253000 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]
Kernel driver in use: i801_smbus
...
--------------------------------------------------------------
Only 4 core temps reported by sensors (/proc/cpuinfo shows all 8).
Senors report:
---------------------------------------------
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 0 RPM
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +45.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +44.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +43.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +43.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +44.0°C (high = +100.0°C, crit = +100.0°C)
acpitz-virtual-0
Adapter: Virtual device
temp1: +44.0°C (crit = +98.0°C)
pch_skylake-virtual-0
Adapter: Virtual device
temp1: +40.0°C
iwlwifi-virtual-0
Adapter: Virtual device
temp1: +34.0°C
------------------------------------------------
sensors-detect complains:
-------------------------------------------------
Do you want to probe the I2C/SMBus adapters now? (YES/no):
Using driver `i2c-i801' for device 0000:00:1f.4: Sunrise Point-LP (PCH)
modprobe: FATAL: Module i2c-dev not found in directory /lib/modules/4.13.12
Failed to load module i2c-dev.
------------------------------------------------
Of course module can not be loaded in a static kernel. IMHO detection
should not depend on that.
sensors-detect checks if /sys/class/i2c-dev/ exists before trying to
load i2c-dev. Does that directory exist on your system?
Is this the reason for not showing any core temps under thinkpad-isa-0000?
No, I think it's normal that no temperatures are shown there.
Why only 4 under coretemp-isa-0000?
Presumably because you don't have an 8 core CPU. You have a 4 core CPU
with hyperthreading enabled.
Ondřej Lysoněk
