Hello,
After BIOS update to 408 or 409, RDSEED32 error is still remaining, but there is also a new error occurring.
After supend/resume the fan is spinning at high speed and cannot be regulated and is not getting the expected values.
Only a reboot is solving the fan problem, but it is occurring again after next suspend.
Is there any further advice how this can be fixed and how the RDSEED32 error can be solved?
Error:
kernel: RDSEED32 is broken. Disabling the corresponding CPUID bit
Fanspeed after suspend/resume at high speed, which is no problem with BIOS SER9T407
SN: BHXC375AG30069
BIOS SER9T407 - Analysis
inxi -S
System:
Host: yeti-bee Kernel: 6.18.39-x64v3-xanmod1 arch: x86_64 bits: 64
Desktop: GNOME v: 48.7 Distro: Debian GNU/Linux 13 (trixie)
journalctl -k -b -0
..
efi: EFI v2.9 by American Megatrends
DMI: AZW SER9/SER9, BIOS SER9T407 12/17/2025
…
kernel: RDSEED32 is broken. Disabling the corresponding CPUID bit.
BIOS SER9T409 - Analysis
RDSEED32 error should be fixed with the firmware update, but it isn’t!
inxi -S
System:
Host: yeti-bee Kernel: 6.18.39-x64v3-xanmod1 arch: x86_64 bits: 64
Desktop: GNOME v: 48.7 Distro: Debian GNU/Linux 13 (trixie)
journalctl -k -b -0
…
efi: EFI v2.9 by American Megatrends
DMI: AZW SER9/SER9, BIOS SER9T409 06/23/2026
…
kernel: RDSEED32 is broken. Disabling the corresponding CPUID bit.
Fan Speed/Sensors error in 408 and 409
Fan Speed and Temperature output measured before suspend
fan2: 1421 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
temp1: +33.0°C (low = -128.0°C, high = +127.0°C) sensor = thermal diode
temp2: +32.0°C (low = -128.0°C, high = +127.0°C) sensor = thermistor
temp3: +32.0°C (low = -128.0°C, high = +127.0°C)
Output after resume (no proper values available) - NOK
fan2: 0 RPM (min = 0 RPM) ALARM
fan3: 0 RPM (min = 0 RPM) ALARM
temp1: -1.0°C (low = -1.0°C, high = -1.0°C) ALARM sensor = thermal diode
temp2: -1.0°C (low = -1.0°C, high = -1.0°C) ALARM sensor = thermal diode
temp3: -1.0°C (low = -1.0°C, high = -1.0°C) ALARM
Output after reboot, back to the expected behaviour - OK
fan2: 1448 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
temp1: +35.0°C (low = -128.0°C, high = +127.0°C) sensor = thermal diode
temp2: +31.0°C (low = -128.0°C, high = +127.0°C) sensor = thermistor
temp3: +31.0°C (low = -128.0°C, high = +127.0°C)
Fanspeed using Bios SER9T407 - OK
Before suspend
fan2: 1506 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
temp1: +38.0°C (low = -128.0°C, high = +127.0°C) sensor = thermal diode
temp2: +33.0°C (low = -128.0°C, high = +127.0°C) sensor = thermistor
temp3: +33.0°C (low = -128.0°C, high = +127.0°C)
After resume - OK
fan2: 1490 RPM (min = 0 RPM)
fan3: 0 RPM (min = 0 RPM)
temp1: +37.0°C (low = -128.0°C, high = +127.0°C) sensor = thermal diode
temp2: +32.0°C (low = -128.0°C, high = +127.0°C) sensor = thermistor
temp3: +32.0°C (low = -128.0°C, high = +127.0°C)
I am just using the sensors output for this,showing the result, showing values are missing or not getting applied by the firmware when resuming.
Any advice would be welcome.
Thank you
Thomas