Brand new Ubuntu LTS fails to detect 2nd card.

The new long-term release from Ubuntu (which uses 390 as the driver set) fails to “just work” as it does not recognize the existence of the second video card, though the nvidia apps do. The goal of multi-monitors/multi-card is to avoid hand-coding anything in xorg.conf, in favor of using xrandr.

Below notice details about the clean-install, nvidia-smi that shows the two cards, nvidia-detect which shows ‘none’, and xrandr -q which shows one of the two in use and fails to note the second one. Sort of a buffet-- your pick of zero nvidia cards, 1 nvidia card or both nvidia cards, depending on the program you ask. I would have appended the nvidia-bug-report-log.gz as asked, but see no way to attach a file in this GUI.

root@syslog1db3:~# uname -a
Linux syslog1db3 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
root@syslog1db3:~# nvidia-smi
Mon Apr 30 08:04:11 2018
±----------------------------------------------------------------------------+
| NVIDIA-SMI 390.48 Driver Version: 390.48 |
|-------------------------------±---------------------±---------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GT 730 Off | 00000000:01:00.0 N/A | N/A |
| 40% 44C P0 N/A / N/A | 114MiB / 975MiB | N/A Default |
±------------------------------±---------------------±---------------------+
| 1 GeForce GT 610 Off | 00000000:05:00.0 N/A | N/A |
| 40% 44C P0 N/A / N/A | 0MiB / 454MiB | N/A Default |
±------------------------------±---------------------±---------------------+

±----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 Not Supported |
| 1 Not Supported |
±----------------------------------------------------------------------------+
root@syslog1db3:~# nvidia-detector
none
root@syslog1db3:~# xrandr -q
Screen 0: minimum 8 x 8, current 4032 x 1888, maximum 16384 x 16384
VGA-0 connected 1152x864+2880+1024 (normal left inverted right x axis y axis) 400mm x 300mm
2048x1536 75.00 + 60.00
2880x1620 59.97
2560x1600 59.99 59.97
2560x1440 59.96 59.95
2048x1152 59.91 59.90
1920x1440 75.00 60.00
1920x1200 59.95 59.88
1920x1080 59.96 59.93
1856x1392 75.00 60.01
1792x1344 75.00 60.01
1680x1050 84.94 74.89 69.88 59.95 59.88
1600x1200 85.00 75.00 70.00 65.00 60.00
1600x900 59.95 59.82 59.99 59.94
1440x900 59.89
1440x810 60.00 59.97
1400x1050 85.00 74.76 70.00 59.98
1400x900 59.96 59.88
1368x768 59.88 59.85
1360x768 59.96 59.80
1280x1024 85.02 75.02 60.02
1280x960 85.00 60.00
1280x800 59.91 59.81 59.99 59.97
1280x720 59.86 59.74 60.00 59.99
1152x864 100.00 85.06 85.00 75.00 75.00 70.00 60.00
1152x864_60.00 59.96*
1024x768 85.00 86.96 75.03 70.07 60.00
1024x576 59.90 59.82 59.96 59.95
960x600 60.00 59.93
960x540 59.82 59.63 59.99 59.96
864x486 59.92 59.57
840x525 85.02 74.96 69.88 60.01 59.88
832x624 74.55
800x600 85.14 85.06 75.00 72.19 60.32 56.25
800x450 59.95 59.82
720x450 59.89
720x400 85.04
700x525 74.76 59.98
700x450 59.96 59.88
684x384 59.88 59.85
680x384 59.96 59.80
640x480 85.01 75.00 72.81 72.81 59.94
640x400 85.08 59.98 59.88
640x360 59.86 59.83
640x350 85.08
512x384 70.07 87.06 60.00
512x288 60.00 59.92
480x270 59.82 59.63
432x243 59.92 59.57
400x300 72.19
320x240 72.81 60.05
320x175 85.27
DVI-D-0 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 443mm x 249mm
1600x900 59.98*+ 75.00 60.00
1360x765 60.00
1280x1024 75.02 60.02
1280x960 60.00
1280x800 59.81
1280x720 60.00
1152x864 75.00
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32 56.25
640x480 75.00 72.81 59.94
HDMI-0 connected 1280x1024+1600+0 (normal left inverted right x axis y axis) 340mm x 270mm
1280x1024 60.02*+ 75.02
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32
640x480 75.00 72.81 59.94
root@syslog1db3:~#

nvidia-bug-report.log.gz (121 KB)

I saw how to add it. The bug report is attached.