Trying to figure out the cause of CPU being constantly current limited to <10W in linux (ROG Flow z13)

[Mnky313]

I've been messing with linux on my Flow Z13 again and I thought the throttling issue was fixed on recent kernels but it appears not.

The CPU (12900H on mine but it appears to be on every Z13 12500H-13900H) is stuck at ~10W/1GHz, limited by current (as reported by throttled)

I believe it's something to do with Intel DPTF/DTT. I've tried a ton of things including older kernels, disabling intel_pstate, throttled, changing performance mode/governor, BIOS updates, etc.

My guess is it could be related to the DPTF ACPI uuids, there's a lot of talk about this on ultrabooks but it seems like a very similar issue. On the Z13 there are no available UUIDs though.

/sys/bus/platform/devices/INTC1041:00/uuids/available_uuids
UNKNOWN

/sys/bus/platform/devices/INTC1041:00/uuids/current_uuid
INVALID

From what I've seen it seems like the available IDs can't be changed and is something set in firmware (and apparently it can be set differently for Windows/Linux?)

If someone has more insight that would be awesome. I've also made attempts to contact ASUS but they don't have an email and the online chat doesn't work so... If there is some actual way to report UEFI/Firmware issues that would be awesome.

[igormp]

Did you install throttled and remove thermald? Having both might cause conflicts.

 

I remember having a similar issue with my previous thinkpad, and throttled did the trick for me.

[Mnky313]

3 minutes ago, igormp said:

Did you install throttled and remove thermald? Having both might cause conflicts.

 

I remember having a similar issue with my previous thinkpad, and throttled did the trick for me.

yep, even with no thermald and throttled running it's the same result.

[Mnky313]

After downgrading all the way back to BIOS 310 I am able to get up to 45w! Still can't seem to get past that but the UEFI mod should allow me to if I wanted.

Either way 45W is WAY better than 10W.

Interestingly the available_uuids still shows UNKNOWN but the current one now shows 42A441D6-AE6A-462b-A84B-4A8CE79027D3.

[huoba0131]

u did a great job!!! I have the same problem as you. Just downgrade it to 310. everything is fine now