Can't set 2k resolution (option not shown)

[tomasch2]

Dear Ubuntu Community,

few weeks ago, I bought a new monitor. It is a BenQ PD2500Q. This screen has a WQHD resolution. My problem is, that my system only shows FHD as highest resolution possible (using Mini Display-Port). What can I do, to use the full resources of the monitor?

My system:
Notebook:
T430 (2349D17)
(external Monitor up to 2560×1600@60Hz https://support.lenovo.com/us/en/solutions/pd024705)

CPU:
i5 3320M

GPU:
Nvidia NVS 5400M
Driver used:
nvidia-diver-390.138

OS:
Ubuntu 20.04

I would be very grateful, if anyone could help my to solve this issue!
Thomas

[Autodave]

Where did you get the driver from?

[tomasch2]

I'm using the driver which is proposed by ubuntu (software & Updates / Additional Drivers).

[Autodave]

Does the system recognize the monitor correctly when connected? Have you tried another cable?

[tomasch2]

Yes I tried to another cable, but nothing changed and ubuntu recognizes the monitor (e.g. Xorg.0.log)


May be there are some useful information in this ouput:
xrandr --prop:
tomas@tomas-ThinkPad-T430:~$ xrandr --prop
Screen 0: minimum 8 x 8, current 3520 x 1284, maximum 16384 x 16384
LVDS-0 connected primary 1600x900+0+384 (normal left inverted right x axis y axis) 309mm x 174mm
_MUTTER_PRESENTATION_OUTPUT: 0
EDID:
00ffffffffffff0006af3e2100000000
21140104901f11780261959c59528f26
21505400000001010101010101010101
010101010101f82a409a61840c30402a
330035ae10000018a51c409a61840c30
402a330035ae10000018000000fe0041
554f0a202020202020202020000000fe
004231343052573032205631200a00d0
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: LVDS
supported: LVDS
ConnectorType: Panel
ConnectorNumber: 0
_ConnectorLocation: 0
non-desktop: 0
supported: 0, 1
1600x900 60.01*+ 40.00
DP-0 disconnected (normal left inverted right x axis y axis)
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: TMDS
supported: TMDS
ConnectorType: DisplayPort
ConnectorNumber: 2
_ConnectorLocation: 2
non-desktop: 0
supported: 0, 1
DP-1 disconnected (normal left inverted right x axis y axis)
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: TMDS
supported: TMDS
ConnectorType: DisplayPort
ConnectorNumber: 3
_ConnectorLocation: 3
non-desktop: 0
supported: 0, 1
DP-2 disconnected (normal left inverted right x axis y axis)
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: TMDS
supported: TMDS
ConnectorType: DisplayPort
ConnectorNumber: 4
_ConnectorLocation: 4
non-desktop: 0
supported: 0, 1
DP-3 connected 1920x1080+1600+0 (normal left inverted right x axis y axis) 550mm x 310mm
_MUTTER_PRESENTATION_OUTPUT: 0
EDID:
00ffffffffffff0009d12a8045540000
0f1e0104a5371f783e4455a9554d9d26
0f5054256b80d1c0b300a9c081808100
81c001010101565e00a0a0a029502f20
350029372100001a000000ff0039344c
30303239353031510a20000000fd0032
4c1e5a19000a202020202020000000fc
0042656e5120504432353030510a0159
020323f150901f222120051404131211
0302010706230907078301000065030c
002000011d007251d01e206e28550029
372100001e8c0ad08a20e02d10103e96
002937210000188c0ad090204031200c
4055002937210000188c0ad090204031
200c4055002937210000180000000000
000000000000000000000000000000e8
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: DisplayPort
supported: DisplayPort
ConnectorType: DisplayPort
ConnectorNumber: 2
_ConnectorLocation: 2
non-desktop: 0
supported: 0, 1
1920x1080 60.00 + 59.94* 50.00 29.97 25.00 23.98
1680x1050 59.95
1600x900 60.00
1280x1024 75.02 60.02
1280x800 59.81
1280x720 60.00 59.94 50.00
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 59.94
640x480 75.00 59.94 59.93
DP-4 disconnected (normal left inverted right x axis y axis)
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: DisplayPort
supported: DisplayPort
ConnectorType: DisplayPort
ConnectorNumber: 3
_ConnectorLocation: 3
non-desktop: 0
supported: 0, 1
DP-5 disconnected (normal left inverted right x axis y axis)
BorderDimensions: 4
supported: 4
Border: 0 0 0 0
range: (0, 65535)
SignalFormat: DisplayPort
supported: DisplayPort
ConnectorType: DisplayPort
ConnectorNumber: 4
_ConnectorLocation: 4
non-desktop: 0
supported: 0, 1

[Holger_Gehrke]

You might want to take a look at what the monitor has to say about itself. Install the package 'read-edid' and run 'get-edid|parse-edid'. This should tell you what the monitor tells the system about itself.

Holger

Edit: I believe you need to be a member of the group 'i2c' for read-edid to work ...

[Yellow Pasque]

Make sure the BenQ is set to DisplayPort 1.1 standard

[tomasch2]

THANK YOU!!!

The DisplayPort 1.1 standard is the solution of my issue! Default there was set the 1.2 standard. As soon I changed this setting at the BenQ, the 2560×1440 resolution was shown as option. Thank you very much to all of you who supported me!!!

Thomas