Yes, so this was all due to this bug: https://bugs.freedesktop.org/show_bug.cgi?id=90482
On Sun, Apr 05, 2015 at 01:56:51PM -0400, Ilia Mirkin wrote: > You can use perf to try to see where the cpu time is going. > > On Sun, Apr 5, 2015 at 1:42 PM, Matti Nykyri <[email protected]> wrote: > > Hello > > > > I recently switched from Nvidia binary driver to Nouveau. I have > > encountered a possible bug in the kernel module. Before I file a bug report > > I would like to know if this is a known issue or not. > > > > I believe it is related to sleep state and power management of the driver. > > > > The Bug: > > > > When the computer is left on it's own to go to a power save mode X takes > > 100% CPU-time in its thread. A trace to X server shows this is caused by > > select-systemcall immediately returning when X is polling its FD's. The FD > > nro 12 is constantly indicating that there is data to read so X will never > > sleep. The FD 12 is a r/w socket connected via netlink to kernel's UEVENT. > > > > Restarting X resets the problem to wait again for the sleep state. A new > > sleep will make the problem arice again. > > > > > > Hardware: > > > > I have Fermi nVidia gpu GF104 NVC4 (GeForce GTX 460) and i5 quad core amd64 > > processor > > > > Software: > > > > System is running gentoo with stable > > 'default/linux/amd64/13.0/desktop/kde'-profile > > > > Kernel: > > sys-kernel/gentoo-sources-3.18.7 > > > > Nouveau driver: > > x11-drivers/xf86-video-nouveau-1.0.11 > > > > Xorg-server: > > x11-base/xorg-server-1.16.4 > > > > KMS is used for selecting video modes. > > > > ---- dmesg ---- > > [ 0.623063] [drm] Initialized drm 1.1.0 20060810 > > [ 0.623272] nouveau [ DEVICE][0000:01:00.0] BOOT0 : 0x0c4100a1 > > [ 0.623274] nouveau [ DEVICE][0000:01:00.0] Chipset: GF104 (NVC4) > > [ 0.623275] nouveau [ DEVICE][0000:01:00.0] Family : NVC0 > > [ 0.623307] nouveau [ VBIOS][0000:01:00.0] checking PRAMIN for > > image... > > [ 0.716983] nouveau [ VBIOS][0000:01:00.0] ... appears to be valid > > [ 0.716985] nouveau [ VBIOS][0000:01:00.0] using image from PRAMIN > > [ 0.717075] nouveau [ VBIOS][0000:01:00.0] BIT signature found > > [ 0.717076] nouveau [ VBIOS][0000:01:00.0] version 70.04.1b.00.02 > > [ 0.739319] nouveau 0000:01:00.0: irq 34 for MSI/MSI-X > > [ 0.739327] nouveau [ PMC][0000:01:00.0] MSI interrupts enabled > > [ 0.739359] nouveau [ PFB][0000:01:00.0] RAM type: GDDR5 > > [ 0.739360] nouveau [ PFB][0000:01:00.0] RAM size: 1024 MiB > > [ 0.739361] nouveau [ PFB][0000:01:00.0] ZCOMP: 0 tags > > [ 0.744934] nouveau [ VOLT][0000:01:00.0] GPU voltage: 875000uv > > [ 0.773304] nouveau [ PTHERM][0000:01:00.0] FAN control: PWM > > [ 0.773316] nouveau [ PTHERM][0000:01:00.0] fan management: automatic > > [ 0.773343] nouveau [ PTHERM][0000:01:00.0] internal sensor: yes > > [ 0.793417] nouveau [ CLK][0000:01:00.0] 03: core 50 MHz memory 135 > > MHz > > [ 0.793419] nouveau [ CLK][0000:01:00.0] 07: core 405 MHz memory > > 324 MHz > > [ 0.793421] nouveau [ CLK][0000:01:00.0] 0c: core 405 MHz memory > > 1900 MHz > > [ 0.793423] nouveau [ CLK][0000:01:00.0] 0f: core 800 MHz memory > > 1900 MHz > > [ 0.793498] nouveau [ CLK][0000:01:00.0] --: core 50 MHz memory 135 > > MHz > > [ 0.803150] nouveau [ DRM] VRAM: 1024 MiB > > [ 0.803151] nouveau [ DRM] GART: 1048576 MiB > > [ 0.803154] nouveau [ DRM] TMDS table version 2.0 > > [ 0.803155] nouveau [ DRM] DCB version 4.0 > > [ 0.803157] nouveau [ DRM] DCB outp 00: 04000310 00000000 > > [ 0.803158] nouveau [ DRM] DCB outp 01: 02011300 00020030 > > [ 0.803159] nouveau [ DRM] DCB outp 02: 01011302 00020030 > > [ 0.803160] nouveau [ DRM] DCB outp 03: 02022362 00020010 > > [ 0.803161] nouveau [ DRM] DCB outp 04: 08033382 00020030 > > [ 0.803162] nouveau [ DRM] DCB conn 00: 00000000 > > [ 0.803164] nouveau [ DRM] DCB conn 01: 00001130 > > [ 0.803165] nouveau [ DRM] DCB conn 02: 00002261 > > [ 0.803166] nouveau [ DRM] DCB conn 03: 00010330 > > [ 0.803819] [drm] forcing VGA-1 connector OFF > > [ 0.803928] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > > [ 0.803928] [drm] Driver supports precise vblank timestamp query. > > [ 0.818699] nouveau [ DRM] MM: using COPY1 for buffer copies > > [ 1.063301] nouveau [ DRM] allocated 1920x1080 fb: 0x60000, bo > > ffff880215bee800 > > [ 1.063423] fbcon: nouveaufb (fb0) is primary device > > [ 1.181816] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device > > [ 1.181817] nouveau 0000:01:00.0: registered panic notifier > > [ 1.197990] [drm] Initialized nouveau 1.2.1 20120801 for 0000:01:00.0 on > > minor 0 > > ---- end ---- > > > > X uses 2 separate screens in ZaphodHeads mode > > > > ---- Xorg.0.log ---- > > [176404.378] (II) xfree86: Adding drm device (/dev/dri/card0) > > [176404.384] (II) LoadModule: "nouveau" > > [176404.385] (II) Loading /usr/lib64/xorg/modules/drivers/nouveau_drv.so > > [176404.385] (II) Module nouveau: vendor="X.Org Foundation" > > [176404.385] (II) NOUVEAU driver > > [176404.385] (II) NOUVEAU driver for NVIDIA chipset families : > > [176404.386] (II) [drm] nouveau interface version: 1.2.1 > > [176404.386] (II) [drm] nouveau interface version: 1.2.1 > > [176404.387] (--) NOUVEAU(0): Chipset: "NVIDIA NVC4" > > [176404.387] (==) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32 > > [176404.387] (==) NOUVEAU(0): RGB weight 888 > > [176404.387] (==) NOUVEAU(0): Default visual is TrueColor > > [176404.387] (**) NOUVEAU(0): Option "ZaphodHeads" "HDMI-1" > > [176404.387] (==) NOUVEAU(0): Using HW cursor > > [176404.387] (==) NOUVEAU(0): GLX sync to VBlank enabled. > > [176404.387] (==) NOUVEAU(0): Page flipping enabled > > [176404.387] (==) NOUVEAU(0): Swap limit set to 1 [Max allowed 2] > > [176404.387] (==) NOUVEAU(0): Page flipping synced to vblank by kernel. > > [176404.387] (II) NOUVEAU(0): Initializing outputs ... > > [176404.507] (II) NOUVEAU(0): Output HDMI-1 using monitor section Monitor0 > > [176404.507] (**) NOUVEAU(0): Option "PreferredMode" "1920x1080_23" > > [176404.508] (WW) NOUVEAU(0): Option "MaxClock" requires a frequency value > > etc... > > ---- end ---- > > > > Any ideas? > > > > -- > > -Matti > > _______________________________________________ > > Nouveau mailing list > > [email protected] > > http://lists.freedesktop.org/mailman/listinfo/nouveau -- -Matti _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
