Eu tenho um equipamento de teste sem cabeça (não há monitor algum) para a mineração de criptografia com duas placas gráficas (GTX1060). Funcionou bem até a atualização para o lançamento 17.10.
ghopper@miner:~$ uname -a
Linux miner 4.13.0-19-generic #22-Ubuntu SMP Mon Dec 4 11:58:07 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
ghopper@miner:~$ ps -ef|grep X
root 1082 1080 0 13:25 tty1 00:00:00 /usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/127/gdm/Xauthority -background none -noreset -keeptty -verbose 3
ghopper 1571 1557 0 14:25 pts/0 00:00:00 grep --color=auto X
ghopper@miner:~$ xauth list
miner/unix:0 MIT-MAGIC-COOKIE-1 2386b22487fb3507bdb0a62d36c2da20
ghopper@miner:~$ echo $DISPLAY
:0
ghopper@miner:~$ cat /etc/X11/xorg.conf
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 384.90 (buildmeister@swio-display-x86-rhel47-05) Tue Sep 19 18:13:03 PDT 2017
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 1060 3GB"
BusID "PCI:2:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GTX 1060 3GB"
BusID "PCI:3:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "AllowEmptyInitialConfiguration" "True"
Option "UseDisplayDevice" "DFP-0"
Option "Coolbits" "31"
Option "ConnectedMonitor" "DFP-0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "AllowEmptyInitialConfiguration" "True"
Option "UseDisplayDevice" "DFP-0"
Option "Coolbits" "31"
Option "ConnectedMonitor" "DFP-0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
As cartas funcionam bem:
ghopper@miner:~$ nvidia-smi
Fri Dec 8 13:50:11 2017
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 384.90 Driver Version: 384.90 |
|-------------------------------+----------------------+----------------------+
| 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 GTX 106... Off | 00000000:02:00.0 On | N/A |
| 46% 75C P2 102W / 120W | 2454MiB / 3011MiB | 99% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 106... Off | 00000000:03:00.0 On | N/A |
| 44% 72C P2 97W / 120W | 2403MiB / 3013MiB | 99% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 888 C /home/ghopper/claymore/ethdcrminer64 2385MiB |
| 0 1082 G /usr/lib/xorg/Xorg 13MiB |
| 0 1118 G /usr/bin/gnome-shell 51MiB |
| 1 888 C /home/ghopper/claymore/ethdcrminer64 2385MiB |
| 1 1082 G /usr/lib/xorg/Xorg 6MiB |
+-----------------------------------------------------------------------------+
Aqui está o meu problema: não consigo usar a ferramenta nvidia-settings.
ghopper@miner:~$ nvidia-settings
Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused
ERROR: The control display is undefined; please run 'nvidia-settings --help' for usage information.
ghopper@miner:~$ xhost
Invalid MIT-MAGIC-COOKIE-1 keyxhost: unable to open display ":0"
ghopper@miner:~$ DISPLAY=:0 nvidia-settings
Invalid MIT-MAGIC-COOKIE-1 keyUnable to init server: Could not connect: Connection refused
ERROR: The control display is undefined; please run 'nvidia-settings --help' for usage information.
ghopper@miner:~$ DISPLAY=:1 nvidia-settings
Unable to init server: Could not connect: Connection refused
ERROR: The control display is undefined; please run 'nvidia-settings --help' for usage information.
O que posso fazer para corrigir isso?