I have just tried using a second monitor, which has been connected for almost a year.
I last used it less than a week ago.
My main PC is in our bedroom and the ‘other’ monitor is the TV in the living room.
when I go into ‘settings’ / ‘display & monitor’ I see both monitors but the secondary one is ‘greyed out’
What I think is strange is that when I reboot, the second monitor springs into life, showing the ‘kubuntu’ name
Then on boot-up, nothing.
I’ve checked the connections and there’s nothing wrong with them, otherwise there would be no ‘screen’ in the settings display.
Which graphics card and drivers ?
lspci
00:00.0 Host bridge: Intel Corporation Device 5904 (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Device 5916 (rev 02)
00:04.0 Signal processing controller: Intel Corporation Skylake Processor Thermal Subsystem (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Device 9d10 (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1d.0 PCI bridge: Intel Corporation Device 9d18 (rev f1)
00:1d.3 PCI bridge: Intel Corporation Device 9d1b (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d58 (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 0a)
05:00.0 Network controller: Intel Corporation Device 24fb (rev 10)
Is that of any help?
If not, what else do you need and how do I get t?
sudo lshw -C display
?
My main PC is in our bedroom and the 'other' monitor is the TV in the living room.
Can you explain that ? … so they’re somehow connected at the same time ?
How is the TV connected ? … HDMI ? … how long is the cable ?
sudo lshw -C display
*-display
description: VGA compatible controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:131 memory:b0000000-b0ffffff memory:a0000000-afffffff ioport:4000(size=64) memory:c0000-dffff
My Desktop Kubuntu 14.04 is in our bedroom and we have a Samsung 51" TV on the front room wall connected by a 10m HDMI cable which had been connected for over a year with no problems then one day it fails to work but on the settings screen, there is a representation of the TV but its greyed out, So, my PC can se it but for some reason is not displaying to it, yet when I reboot, I get the ‘Kubuntu’ logo displayed then it goes off!!!
xrandr
[/quote]
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1366x768 60.00*+ 40.00
1360x768 59.80 59.96
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
960x600 60.00
960x540 59.99
800x600 60.00 60.32 56.25
840x525 60.01 59.88
800x512 60.17
700x525 59.98
640x512 60.02
720x450 59.89
640x480 60.00 59.94
680x384 59.80 59.96
576x432 60.06
512x384 60.00
400x300 60.32 56.34
320x240 60.05
HDMI-1 disconnected (normal left inverted right x axis y axis)
It’s there but not sending anything to it!
Only on shut-down/reboot.
The cable is 10m and going up into the attic then across to the bedroom then into the bedroom.
I will be testing it with my laptop, I will be connecting the HDMI to the laptop from the bedroom end to see if it’s a problem with the cable ot the desktop PC.
It’s sorted!
I connected my laptop to the TV via the HDMI cable which was connected to the desktop PC in the bedroom and it worked, there was a signal going through to the TV, so the problem was not the HDMI cable.
I then connected it all back up to the desktop PC in the bedroom and had another look at the monitor settings.
something made me click in te tick box of the TV in the front room and it activated (it was already ‘ticked’) which was the strange thing.
everything is now working.
