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Nouveau with gdm loggin screen

This is an odd one. When Fedora boots (either 22 or 23), the logging screen is sluggish: I mean, press a key wait for two seconds to have something appear on the screen. Once I log in -- which takes longer than the machine booting up! -- the OS is super responsive and works as expected.

I run a VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1), with nouveau on Fedora 23. Dmesg provides these:

799:[    0.875202] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x124020a1
800:[    0.875203] nouveau  [  DEVICE][0000:01:00.0] Chipset: GM204 (NV124)
801:[    0.875204] nouveau  [  DEVICE][0000:01:00.0] Family : NV110
805:[    0.955995] nouveau  [   VBIOS][0000:01:00.0] using image from PROM
806:[    0.956130] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
807:[    0.956132] nouveau  [   VBIOS][0000:01:00.0] version 84.04.36.00.5a
808:[    0.956419] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
809:[    0.956448] nouveau  [     PFB][0000:01:00.0] RAM type: GDDR5
810:[    0.956449] nouveau  [     PFB][0000:01:00.0] RAM size: 4096 MiB
811:[    0.956449] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
813:[    0.987348] nouveau  [  PGRAPH][0000:01:00.0] using external firmware
814:[    0.987361] nouveau 0000:01:00.0: Direct firmware load for nouveau/nv124_fuc409c failed with error -2
815:[    0.987366] nouveau 0000:01:00.0: Direct firmware load for nouveau/fuc409c failed with error -2
816:[    0.987367] nouveau E[  PGRAPH][0000:01:00.0] failed to load fuc409c
821:[    0.987581] nouveau  [     DRM] VRAM: 4096 MiB
822:[    0.987581] nouveau  [     DRM] GART: 1048576 MiB
823:[    0.987584] nouveau  [     DRM] TMDS table version 2.0
824:[    0.987585] nouveau  [     DRM] DCB version 4.1
825:[    0.987586] nouveau  [     DRM] DCB outp 00: 01000f02 00020030
826:[    0.987587] nouveau  [     DRM] DCB outp 01: 02000f00 00000000
827:[    0.987587] nouveau  [     DRM] DCB outp 02: 04011f82 00020030
828:[    0.987588] nouveau  [     DRM] DCB outp 03: 02022f62 00020010
829:[    0.987589] nouveau  [     DRM] DCB outp 04: 02833f76 04400020
830:[    0.987590] nouveau  [     DRM] DCB outp 05: 02033f72 00020020
831:[    0.987590] nouveau  [     DRM] DCB outp 15: 01df4ff8 00000000
832:[    0.987591] nouveau  [     DRM] DCB conn 00: 00001030
833:[    0.987592] nouveau  [     DRM] DCB conn 01: 01000131
834:[    0.987593] nouveau  [     DRM] DCB conn 02: 00010261
835:[    0.987594] nouveau  [     DRM] DCB conn 03: 00020346
836:[    0.987594] nouveau  [     DRM] DCB conn 04: 00000470
837:[    0.987596] nouveau E[     DRM] Pointer to flat panel table invalid
838:[    0.988438] nouveau W[     DRM] unknown connector type 70
839:[    0.988455] nouveau W[     DRM] failed to create encoder 1/8/0: -19
840:[    0.988456] nouveau W[     DRM] Unknown-1 has no encoders, removing
843:[    0.993735] nouveau E[   PFIFO][0000:01:00.0] unsupported engines 0x00000001
844:[    0.993906] nouveau E[     DRM] failed to create kernel channel, -22
846:[    1.097974] nouveau  [     DRM] allocated 1920x1080 fb: 0x60000, bo ffff8804089a2800
847:[    1.098044] fbcon: nouveaufb (fb0) is primary device
861:[    1.542770] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
862:[    1.542771] nouveau 0000:01:00.0: registered panic notifier
863:[    1.548754] [drm] Initialized nouveau 1.2.2 20120801 for 0000:01:00.0 on minor 0