> Performance level selection (also known as "reclocking") is not
supported yet.
It's not supported but does it work in some cases.
[ 0.000000] Command line: root=/dev/sdc1 rootfstype=ext4 raid=noautodetect ro
nouveau.pstate=1
[ 0.000000] Kernel command line: root=/dev/sdc1 rootfstype=ext4
raid=noautodetect ro nouveau.pstate=1
[ 2.108531] nouveau [ DEVICE][0000:01:00.0] BOOT0 : 0x0e7060a2
[ 2.108536] nouveau [ DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[ 2.108539] nouveau [ DEVICE][0000:01:00.0] Family : NVE0
[ 2.108563] nouveau [ VBIOS][0000:01:00.0] checking PRAMIN for image...
[ 2.108571] nouveau [ VBIOS][0000:01:00.0] ... signature not found
[ 2.108573] nouveau [ VBIOS][0000:01:00.0] checking PROM for image...
[ 2.149775] nouveau [ VBIOS][0000:01:00.0] ... appears to be valid
[ 2.149779] nouveau [ VBIOS][0000:01:00.0] using image from PROM
[ 2.149957] nouveau [ VBIOS][0000:01:00.0] BIT signature found
[ 2.149960] nouveau [ VBIOS][0000:01:00.0] version 80.07.35.00.4f
[ 2.150856] nouveau 0000:01:00.0: irq 33 for MSI/MSI-X
[ 2.150869] nouveau [ PMC][0000:01:00.0] MSI interrupts enabled
[ 2.150933] nouveau [ PFB][0000:01:00.0] RAM type: GDDR5
[ 2.150935] nouveau [ PFB][0000:01:00.0] RAM size: 1024 MiB
[ 2.150937] nouveau [ PFB][0000:01:00.0] ZCOMP: 0 tags
[ 2.811563] nouveau [ PTHERM][0000:01:00.0] FAN control: PWM
[ 2.811588] nouveau [ PTHERM][0000:01:00.0] fan management: automatic
[ 2.811634] nouveau [ PTHERM][0000:01:00.0] internal sensor: yes
[ 2.811711] nouveau [ CLK][0000:01:00.0] 07: core 324 MHz memory 648 MHz
[ 2.811720] nouveau [ CLK][0000:01:00.0] 0a: core 540 MHz memory 1620
MHz
[ 2.811727] nouveau [ CLK][0000:01:00.0] 0f: core 1058 MHz memory 5000
MHz
[ 2.811872] nouveau [ CLK][0000:01:00.0] --: core 324 MHz memory 648 MHz
[ 2.827731] nouveau [ DRM] VRAM: 1024 MiB
[ 2.827733] nouveau [ DRM] GART: 1048576 MiB
[ 2.827737] nouveau [ DRM] TMDS table version 2.0
[ 2.827738] nouveau [ DRM] DCB version 4.0
[ 2.827741] nouveau [ DRM] DCB outp 00: 01000f02 00020030
[ 2.827743] nouveau [ DRM] DCB outp 01: 02000f00 00000000
[ 2.827745] nouveau [ DRM] DCB outp 02: 08011f82 00020030
[ 2.827746] nouveau [ DRM] DCB outp 03: 02022f62 00020010
[ 2.827748] nouveau [ DRM] DCB conn 00: 00001030
[ 2.827750] nouveau [ DRM] DCB conn 01: 00002131
[ 2.827751] nouveau [ DRM] DCB conn 02: 00010263
[ 2.831931] nouveau [ DRM] MM: using COPY for buffer copies
[ 3.028691] nouveau [ DRM] allocated 1920x1200 fb: 0x80000, bo
ffff880621695800
[ 3.028742] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[ 3.028744] nouveau 0000:01:00.0: registered panic notifier
[ 3.028747] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on
minor 0
[ 757.564771] nouveau E[ CLK][0000:01:00.0] failed to raise voltage: -22
[ 757.564778] nouveau E[ CLK][0000:01:00.0] error setting pstate 1: -22
[ 802.350431] nouveau E[ CLK][0000:01:00.0] failed to raise voltage: -22
[ 802.350439] nouveau E[ CLK][0000:01:00.0] error setting pstate 2: -22
Do the errors mean it didn't set?
# cat /sys/class/drm/card0/device/pstate
07: core 324 MHz memory 648 MHz
0a: core 540 MHz memory 1620 MHz AC DC *
0f: core 1058 MHz memory 5000 MHz
AC: core 324 MHz memory 1620 MHz
# echo 0f > /sys/class/drm/card0/device/pstate
# cat /sys/class/drm/card0/device/pstate
07: core 324 MHz memory 648 MHz
0a: core 540 MHz memory 1620 MHz
0f: core 1058 MHz memory 5000 MHz AC DC *
AC: core 324 MHz memory 5040 MHz
Is the :"AC" one supposed to be the current one?
Why does it say "5040 MHz" but 0f says "5000 MHz"?