Ubuntu

LG 25UM57 2560x1080 EDID incorrect

Asked by Kevin Benham

I upgraded to a new CPU/motherboard that supports 2560x1080 graphics resolution. However, Ubuntu detects the monitor as a LG 34 in display and 2560x1080 resolution is not an option. Been testing with xrandr, but can't seem to get the settings correct. Anyone have some insight or the magic commands to fix this?

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actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a

Thanks

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Kevin Benham (fixnkev) said : 		#2

kevin@Flash:~$ sudo lshw -C display; lsb_release -a; uname -a
[sudo] password for kevin:
  *-display
       description: VGA compatible controller
       product: RS780L [Radeon 3000]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 5
       bus info: pci@0000:01:05.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:18 memory:d0000000-dfffffff ioport:ee00(size=256) memory:fdee0000-fdeeffff memory:fdd00000-fddfffff
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
Linux Flash 4.2.0-18-generic #22-Ubuntu SMP Fri Nov 6 18:25:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

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actionparsnip (andrew-woodhead666) said : 		#3

Supports HDMI with max. resolution 1920 x 1080 @ 60 Hz - Supports DVI with max. resolution 1920 x 1200 @ 60 Hz

Source:
http://www.pcadvisor.co.uk/forum/helproom-1/what-graphics-card-buy-4129351/

Your video card cannot output at 2560x1080

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Kevin Benham (fixnkev) said : 		#4

Interesting. I am using the integrated HDMI on my new GigaByte GA-78LMT-USB3 system board that says is supports max res of 2560x1080. The bios is a F2 and maybe updating to F4 might fix? The Xorg.log does list the 2560x1080 support.

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michael (yellupcm-gmail) said : 		#5

Kevin
Check site below. They say the drivers do not support anything newer then Ubuntu 12.04.

http://ubuntuforums.org/showthread.php?t=2233989

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Kevin Benham (fixnkev) said : 		#6

Bummer, thanks for your help. I should be able to add a video adapter to fix my issue, correct? Any that you recommend?

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Launchpad Janitor (janitor) said : 		#7

This question was expired because it remained in the 'Open' state without activity for the last 15 days.