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  1. +-----------------------------------------------------------------------------+
  2. | NVIDIA-SMI 515.48.07    Driver Version: 515.48.07    CUDA Version: 11.7     |
  3. |-------------------------------+----------------------+----------------------+
  4. | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
  5. | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
  6. |                               |                      |               MIG M. |
  7. |===============================+======================+======================|
  8. |   0  NVIDIA GeForce ...  Off  | 00000000:05:00.0  On |                  N/A |
  9. | 41%   43C    P0    N/A /  30W |    134MiB /  2048MiB |     20%      Default |
  10. |                               |                      |                  N/A |
  11. +-------------------------------+----------------------+----------------------+
  12. |   1  NVIDIA GeForce ...  Off  | 00000000:0A:00.0 Off |                  N/A |
  13. |  0%   40C    P5    13W / 180W |    355MiB /  8192MiB |      6%      Default |
  14. |                               |                      |                  N/A |
  15. +-------------------------------+----------------------+----------------------+
  16.                                                                                
  17. +-----------------------------------------------------------------------------+
  18. | Processes:                                                                  |
  19. |  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
  20. |        ID   ID                                                   Usage      |
  21. |=============================================================================|
  22. |    0   N/A  N/A      3450      G   /usr/lib/xorg/Xorg                133MiB |
  23. |    1   N/A  N/A      3450      G   /usr/lib/xorg/Xorg                229MiB |
  24. |    1   N/A  N/A      3618      G   /usr/bin/gnome-shell               96MiB |
  25. |    1   N/A  N/A      5009      G   ...RendererForSitePerProcess       26MiB |
  26. +-----------------------------------------------------------------------------+
  27.  
  28. $ lspci|grep -i VGA
  29. 05:00.0 VGA compatible controller: NVIDIA Corporation GP108 [GeForce GT 1030] (rev a1)
  30. 0a:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1070] (rev a1)
  31.  
  32. $ cat /etc/X11/xorg.conf.d/nvidia
  33. Section "Device"
  34.     Identifier     "Device0"
  35.     Driver         "nvidia"
  36.     VendorName     "NVIDIA Corporation"
  37.     BusID          "PCI:05:00.0"
  38. EndSection
  39.  
  40. $ grep -i nvidia /etc/X11/xorg.conf
  41. # nvidia-xconfig: X configuration file generated by nvidia-xconfig
  42. # nvidia-xconfig:  version 515.48.07
  43.  
  44.  
  45. $ sudo dmesg|grep -i nvidia
  46. [sudo] password for jabowery:
  47. [    3.725414] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:02.0/0000:05:00.1/sound/card0/input16
  48. [    3.725503] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:02.0/0000:05:00.1/sound/card0/input17
  49. [    3.725574] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:02.0/0000:05:00.1/sound/card0/input18
  50. [    3.725608] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:02.0/0000:05:00.1/sound/card0/input19
  51. [    3.725661] input: HDA NVidia HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:02.0/0000:05:00.1/sound/card0/input20
  52. [    3.725695] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input9
  53. [    3.725823] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input10
  54. [    3.725849] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input11
  55. [    3.725879] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input12
  56. [    3.725924] input: HDA NVidia HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input13
  57. [    3.725958] input: HDA NVidia HDMI/DP,pcm=11 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input14
  58. [    3.725997] input: HDA NVidia HDMI/DP,pcm=12 as /devices/pci0000:00/0000:00:03.1/0000:0a:00.1/sound/card1/input15
  59. [    3.779742] audit: type=1400 audit(1657233418.439:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe" pid=914 comm="apparmor_parser"
  60. [    3.779746] audit: type=1400 audit(1657233418.439:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe//kmod" pid=914 comm="apparmor_parser"
  61. [    3.891550] nvidia: loading out-of-tree module taints kernel.
  62. [    3.891557] nvidia: module license 'NVIDIA' taints kernel.
  63. [    3.938802] nvidia: module verification failed: signature and/or required key missing - tainting kernel
  64. [    3.969170] nvidia-nvlink: Nvlink Core is being initialized, major device number 507
  65. [    3.970268] nvidia 0000:05:00.0: enabling device (0000 -> 0003)
  66. [    3.970336] nvidia 0000:05:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
  67. [    4.086388] nvidia 0000:0a:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
  68. [    4.202241] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  515.48.07  Fri May 27 03:26:43 UTC 2022
  69. [    4.285170] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  515.48.07  Fri May 27 03:18:00 UTC 2022
  70. [    4.287448] [drm] [nvidia-drm] [GPU ID 0x00000500] Loading driver
  71. [    5.354750] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:05:00.0 on minor 0
  72. [    5.354835] [drm] [nvidia-drm] [GPU ID 0x00000a00] Loading driver
  73. [    6.143350] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:0a:00.0 on minor 1
  74. [    6.726610] nvidia_uvm: module uses symbols from proprietary module nvidia, inheriting taint.
  75. [    6.730289] nvidia-uvm: Loaded the UVM driver, major device number 505.
  76. [   28.916925] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  77. [   28.916979] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  78. [   28.917002] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  79. [   28.917022] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  80. [   28.917039] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  81. [   28.917055] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  82. [   28.917072] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  83. [   28.917085] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  84. [   28.941643] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  85. [   28.941676] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  86. [   28.941696] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  87. [   28.941712] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  88. [   28.941728] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  89. [   28.941742] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  90. [   28.941758] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  91. [   28.941776] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  92. [   28.966299] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  93. [   28.966337] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  94. [   28.966358] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  95. [   28.966374] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  96. [   28.966393] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  97. [   28.966408] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  98. [   28.966424] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000a00] Failed to grab modeset ownership
  99. [   28.966440] [drm:nv_drm_master_set [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000500] Failed to grab modeset ownership
  100.  
  101.  
  102. That failed to fix the problem so I tried the solution proffered at the end:
  103.  
  104. Section "Screen"
  105. Identifier "Screen0"
  106. Device "Device0"
  107. Monitor "Monitor0"
  108. DefaultDepth 24
  109. Option "MultiGPU" "on" #this was recommended by https://forums.developer.nvidia.com/t/how-do-i-set-one-gpu-for-display-and-the-other-two-gpus-for-cuda-computing/49113/18
  110. SubSection "Display"
  111. Depth 24
  112. EndSubSection
  113. EndSection
  114.  
  115. but that didn't work either.
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