Can't use ultrawide monitor without black bars left and right...
by browny_amiga from LinuxQuestions.org on (#53NGG)
I have Samsung ultrawide display that I use via HDMI on a Dell Latitude E6540 with Debian Buster (Debian Stable) on it.
It can support a resolution of 3840 x 1080, but currently is only set to Full HD 1920 x 1080, and that is the maximum resolution that it will support.
The picture now does not fill the whole screen, there are black vertical bars left and right on the monitor.
Below the output of xrandr, as you can see it has a very strange thing where it says that current is 3840 x 1080, but the highest available mode is 1920 x 1080.
How can I use the full resolution?
The laptop has two graphics cards:
1. Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
2. Radeon HD 8790M
This is a hybrid GPU system (laptop) so both GPUs get routed to the same display normally and have to be manually selected (via xrandr --setprovideroutputsource and using DRI_PRIME=1)
The laptop has only 2 video connectors: HDMI and VGA output.
xrandr output:
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 344mm x 194mm
1920x1080 60.01 + 59.97* 59.96 59.93 40.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 797mm x 333mm
1920x1080 60.00* 60.00 50.00 59.94 30.00 29.97
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
VGA-1-2 disconnected (normal left inverted right x axis y axis)
It can support a resolution of 3840 x 1080, but currently is only set to Full HD 1920 x 1080, and that is the maximum resolution that it will support.
The picture now does not fill the whole screen, there are black vertical bars left and right on the monitor.
Below the output of xrandr, as you can see it has a very strange thing where it says that current is 3840 x 1080, but the highest available mode is 1920 x 1080.
How can I use the full resolution?
The laptop has two graphics cards:
1. Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
2. Radeon HD 8790M
This is a hybrid GPU system (laptop) so both GPUs get routed to the same display normally and have to be manually selected (via xrandr --setprovideroutputsource and using DRI_PRIME=1)
The laptop has only 2 video connectors: HDMI and VGA output.
xrandr output:
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 344mm x 194mm
1920x1080 60.01 + 59.97* 59.96 59.93 40.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 797mm x 333mm
1920x1080 60.00* 60.00 50.00 59.94 30.00 29.97
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 59.90
1280x800 59.91
1152x864 75.00
1280x720 60.00 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
VGA-1-2 disconnected (normal left inverted right x axis y axis)