intel grafic i915 driver no power saving states rc6
Bug #1863489 reported by
arno
This bug report is a duplicate of:
Bug #1853044: 5.3.0-23-generic causes fans to spin when idle.
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This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
It seems that the i915 intel graphic driver in newer kernels (observed with 5.3) doesn't support energy saving.
How do I know that? Using powertop shows in idle tab the GPU - and this shows only : GPU power on 100% - no rc6 or deeper states are used.
For some strange reason also the packet (summery?) shows in all states 0%, although I can observe the individual CPU cores are in different power states.
The previous parameter enable_rc6 is not existing anymore.
The other possible energy saving parameter enable_dc (if set to 1 or 2) results in log with:
setting dangerous option enable_dc - tainting kernel.
Any idea what might go wrong there?
description: | updated |
affects: | ubuntu → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
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powertop:
Take care, maybe you have to scroll down, it is in the middle row below the cpu-cores
For some strange reason also the packet (summery?) shows in all states 0%, although I can observe the individual CPU cores are in different power states.
Edit:
I observed that with Ubuntu Mate 18.04 with new (!) installations. My old installation (kernel 4.15 seems not to be updated to newer version) is not suffered. I have tested also Linux Mint 19.3. Initially (kernel 5.0 if I remember right works) but after update to 5.3 not anymore. So I can exclude hardware as an issue.