Estou usando o Ubuntu 16.04 (dev branch), o XFCE como ambiente de desktop.
Meu computador está conectado a dois monitores. Um via cabo VGA comum e outro
está ligado a um comutador HDMI. Essa configuração funciona bem, mas toda vez que eu mudo temporariamente o HDMI Switcher para outra conexão HDMI, o Xorg detecta que o monitor foi desconectado e reconfigura o Xorg para usar apenas um monitor, a comutação do HDMI Switcher para meu computador não reativa o monitor duplo use também, eu tenho que disparar manualmente com xrandr
Como posso evitar que esse tipo de detecção e reconfiguração automática do monitor aconteça? Eu gostaria de poder trocar o HDMI Switcher sem que o computador faça nada.
Comando usado para restaurar a configuração de vários monitores:
xrandr \
--output HDMI-1 \
--mode "1920x1080" \
--panning "1920x1080+1280+0/0x0+0+0" \
--output DVI-1-I \
--mode "1280x1024" \
--panning "1280x1024/0x0+0+0"
Saída xrandr em uso regular:
Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 8192 x 8192
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+1280+0 (normal left inverted right x axis y axis) 443mm x 249mm panning 1920x1080+1280+0
1920x1080 60.00*+ 60.00 50.00 59.94 59.93
1920x1080i 60.00 50.00 59.94
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 74.76 70.00 59.98
1280x1024 75.02 60.02
1440x900 59.89 59.90
1280x960 60.00
1360x768 59.80 59.96
1280x800 59.91
1152x864 75.00 75.00 70.00 60.00
1280x720 60.00 50.00 59.94
1024x768 60.04 75.03 70.07 60.00
960x720 75.00 60.00
928x696 75.00 60.05
896x672 75.05 60.01
960x600 60.00
832x624 74.55
960x540 59.99
800x600 75.00 70.00 65.00 60.00 72.19 75.00 60.32 56.25
840x525 74.96 69.88 60.01 59.88
720x576 50.00
800x512 60.17
700x525 74.76 70.06 59.98
720x480 60.00 59.94
640x512 75.02 60.02
720x450 59.89
640x480 60.00 72.81 75.00 66.67 60.00 59.94
720x400 70.08
680x384 59.80 59.96
576x432 75.00 75.00 70.00 60.06
512x384 75.03 70.07 60.00
416x312 74.66
400x300 72.19 75.12 60.32 56.34
320x240 72.81 75.00 60.05
DVI-I-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 359mm x 287mm
1280x1024 60.02*+ 75.02
1280x960 60.00
1280x800 74.93 59.81
1152x864 75.00
1280x768 74.89 59.87
1280x720 60.00
1024x768 75.08 75.03 70.07 60.00
1024x576 59.97
832x624 74.55
800x600 72.19 75.00 70.01 60.32 56.25
848x480 60.00
640x480 75.00 72.81 66.67 60.00
720x400 70.08
Saída xrandr quando o comutador HDMI é comutado para uma ligação diferente:
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 359mm x 287mm
1280x1024 60.02*+ 75.02
1280x960 60.00
1280x800 74.93 59.81
1152x864 75.00
1280x768 74.89 59.87
1280x720 60.00
1024x768 75.08 75.03 70.07 60.00
1024x576 59.97
832x624 74.55
800x600 72.19 75.00 70.01 60.32 56.25
848x480 60.00
640x480 75.00 72.81 66.67 60.00
720x400 70.08
Mais algumas coisas que tentei:
Com o monitor conectado, descubra a modelina:
$ xvidtune -show
"1920x1080" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 -hsync +vsync
Depois, com o monitor desconectado:
$ xrandr --newmode "1920x1080-new" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 -hsync +vsync
$ xrandr --addmode HDMI-1 1920x1080-new
$ xrandr --output HDMI-1 --mode 1920x1080-new
Isso me permite ativar a exibição quando desconectada, o que de outra forma falharia devido ao modo inexistente 1920x1080. No entanto, o problema permanece: se eu alternar o comutador HDMI, o monitor fica desativado, mesmo que eu tenha configurado para um modo personalizado.
Estes são os eventos do udev ao desconectar o monitor com o HDMI Switcher:
$ udevadm monitor --property
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[41678.571099] change /devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=3248
SUBSYSTEM=drm
UDEV [41678.573432] change /devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
ID_FOR_SEAT=drm-pci-0000_01_00_0
ID_PATH=pci-0000:01:00.0
ID_PATH_TAG=pci-0000_01_00_0
MAJOR=226
MINOR=0
SEQNUM=3248
SUBSYSTEM=drm
TAGS=:uaccess:master-of-seat:seat:
USEC_INITIALIZED=31279519
Estes são os eventos do udev ao reativar a exibição com o HDMI Switcher:
$ udevadm monitor --property
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[41696.104481] change /devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
MAJOR=226
MINOR=0
SEQNUM=3249
SUBSYSTEM=drm
UDEV [41696.105685] change /devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0 (drm)
ACTION=change
DEVNAME=/dev/dri/card0
DEVPATH=/devices/pci0000:00/0000:00:02.0/0000:01:00.0/drm/card0
DEVTYPE=drm_minor
HOTPLUG=1
ID_FOR_SEAT=drm-pci-0000_01_00_0
ID_PATH=pci-0000:01:00.0
ID_PATH_TAG=pci-0000_01_00_0
MAJOR=226
MINOR=0
SEQNUM=3249
SUBSYSTEM=drm
TAGS=:seat:master-of-seat:uaccess:
USEC_INITIALIZED=31279519
.
$ sudo lshw -c display
*-display
description: VGA compatible controller
product: Redwood XT [Radeon HD 5670/5690/5730]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:55 memory:c0000000-cfffffff memory:fea20000-fea3ffff ioport:e000(size=256) memory:c0000-dffff
Tags multiple-monitors xfce xorg hdmi