I can confirm overheating on HP ZBook 17 G6/860C, BIOS R92 Ver. 01.05.04 06/03/2020 with Ubuntu 5.4.0-84.94-generic kernel.
The problem occurs because of commit: --- thermal/drivers/int340x/processor_thermal: Fix tcc setting BugLink: https://bugs.launchpad.net/bugs/1938713 commit fe6a6de6692e7f7159c1ff42b07ecd737df712b4 upstream. The following fixes are done for tcc sysfs interface: - TCC is 6 bits only from bit 29-24 - TCC of 0 is valid - When BIT(31) is set, this register is read only - Check for invalid tcc value - Error for negative values --- diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c index 89a0153..576523d 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c @@ -150,24 +150,27 @@ static ssize_t tcc_offset_degree_celsius_show(struct device *dev, if (err) return err; - val = (val >> 24) & 0xff; + val = (val >> 24) & 0x3f; return sprintf(buf, "%d\n", (int)val); } -static int tcc_offset_update(int tcc) +static int tcc_offset_update(unsigned int tcc) { u64 val; int err; - if (!tcc) + if (tcc > 63) return -EINVAL; Previous version ignored tcc==0, now it is valid value! In my case during boot Ubuntu execute tcc_offset_update(0). Previous version ignored this value and (I suppose) it used value set by BIOS (in my case 2). When CPUs are fully loaded (for example when compiling kernel) my laptop is shutting down immediately to prevent overheating (on 5.4.0-81-generic works fine). It can be fixed manually by: echo 2 | sudo tee /sys/devices/pci0000:00/0000:00:04.0/tcc_offset_degree_celsius -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943103 Title: Kernel 5.4.0-84 Graphical Issues and Overheating To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1943103/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
