Arch Linux

vitaliy.kuzmich

Member

Registered: 2015-11-29

Posts: 64

Can't disable i915 rc6 power saving moderc

Hello I have some parameters in kernel, but can't disable rc6, its always "1". Also /etc/modprobe.d/i915.conf does not works....

here it is list of kernel params :

nmi_watchdog=0 net.ifnames=0 intel_iommu=off iommu=off spectre_v2=off nopti pti=off l1tf=off nospec_store_bypass_disable no_stf_barrier noibrs noibpb noretpoline i915.enable_rc6=0 intel_idle.max_cstate=1 i915.enable_psr=0 i915.enable_fbc=1 i915.enable_gvt=1 i915.enable_guc_loading=1 i915.enable_guc_submission=1 i915.enable_ips=0 drm.atomic=1 i915.nuclear_pageflip=1

Last edited by vitaliy.kuzmich (2018-11-01 11:00:32)

loqs

Member

Registered: 2014-03-06

Posts: 19,111

Re: Can't disable i915 rc6 power saving moderc

https://git.kernel.org/pub/scm/linux/ke … 95221ec5b8
Edit:
Also no longer used https://git.kernel.org/pub/scm/linux/ke … 4eae6719b1

Last edited by loqs (2018-11-01 11:09:06)

vitaliy.kuzmich

Member

Registered: 2015-11-29

Posts: 64

Re: Can't disable i915 rc6 power saving moderc

I do not mind, the problem is that I have tearing again, I would not touch it but tearing appeared after last couple updates. When there is a fresh boot, its ok, but after sometime or suspend or whatever tearing back... I use xfce without composite. Previously I did successfully fixed it by disabling rc6.

UPD: tried enable_guc=3 for this moment of time tearing are gone, will test more, but I still need gvt, also fbc does not works with iommu....

UPDUPD: lol, now after suspend, X hungs for 3 seconds.

Last edited by vitaliy.kuzmich (2018-11-01 12:19:25)

loqs

Member

Registered: 2014-03-06

Posts: 19,111

Re: Can't disable i915 rc6 power saving moderc

Which X video driver is the system using?  If you remove all options for i915 apart from enable_gvt is there any difference?

vitaliy.kuzmich

Member

Registered: 2015-11-29

Posts: 64

Re: Can't disable i915 rc6 power saving moderc

I use intel driver.
Section "Device"
    Option         "Monitor-HDMI1" "HDMI"
    Option          "Monitor-eDP1" "eDP"
    Identifier    "intel"
    Driver        "intel"
    Option         "TearFree" "true"
    Option        "AccelMethod" "sna"
#    Option      "XvMCSurfaces" "7"
#    Option      "XvMC"                  "true"
#    Option      "UseEvents"             "true"
#    Option     "UseEDID" "false"
#uxa sna
#    Option        "DRI" "3"
EndSection

upd: tearing is back...

Last edited by vitaliy.kuzmich (2018-11-01 20:47:38)

vitaliy.kuzmich

Member

Registered: 2015-11-29

Posts: 64

Re: Can't disable i915 rc6 power saving moderc

upd: after testing, I released that tearing back after I activate suspend. Before that it works fine. Also remove all i915 options did not help.