Hi guys, I’m new to Linux.
I’m really enjoying Manjaro XFCE, life has changed completely.
Question
What should I do to make the 2560x1080 resolution option appear on display settings in Manjaro XFCE Minimal?
In addition to the updates on Pamac after installing Manjaro do I need to do anything else? Do I need to install anything that doesn’t come with Manjaro? If so, how do I do this?
Setup
LG Ultrawide 25 monitor (I use only the monitor screen)
ASUS N53ta Laptop - ATI Radeon® HD 6720G2 Graphics with 2GB DDR3 VRAM
Approaches I’ve tried and failed
Setting a new mode via xrandr
I tried to look for a driver on the AMD website but found nothing that appears to be compatible.
I tried to change the Kernel version to 4.19 and boot but it didn’t change anything.
Context
I used to plug the monitor into the laptop (hdmi) and in Windows 10 it automatically displayed the desired resolution 2560x1080 (21: 9)
After installing the Manjaro XFCE Minimal when I plug in the monitor, the highest resolution that appears to me is 1920x1080
Dont do that. Besides this being a generally bad idea for handling any software in linux (we use repositories and packages and such … and they usually are tied to things like system libraries)… manjaro also has MSM/mhwd to handle these things. Dont deviate from that unless you have a good reason and know what you are doing.
I want to use 2560 x 1080 resolution on my monitor, but it does not appear in the display configuration menu. I’ve tried the approaches mentioned above but nothing has worked.
Yes. That’s exactly what I tried to do.
But when I apply the new mode, the monitor screen goes black.
I don’t know if it is related, but one of the LEDs on my notebook’s panel is continuos in blue color, which means it is only using the integrated GPU. And not the dedicated one.
Wouldn’t using the dedicated card have anything to do with this issue?
Same issue here. Just got a LG 29 … after trying the xrandr method, screen goes black. I can discard the HDMI cable or graphics card because booting with Win10 the screen works perfectly. I believe the issue is more related to the linux driver.
After this step the screen blinks once and the resolution option for 2560 x 1080 (21:9) appears in the Display Settings. I select this new option and after applying it the screen goes black. Same result as using xrandr --output HDMI-0 --mode 2560x1080_60.00 and/or after trying your suggested solution
cvt -r -v 2560 1080
As stated before, the monitor’s native resolution 2560x1080 is shown and works flawless in Win10, but when it boots in Manjaro or Ubuntu it only shows 1920x1080 as the max resolution.
One easy solution I could think of is to get a new graphic card that supports 21:9 with Manjaro and get over with it but I won’t do that. No pain, no gain.
@ashtrax3000 I guess there are problems with these non-standard screens and you are not the only one. But in general it should work. Mostly you have to set lower refresh rate than 60. According to this post:
It works with 44-45hz. Keep sure you have really a HDMI cable of version 1.4a (or higher) or use a display port (recommend for ultra widescreens on linux). And it takes time for syncing depending on your gpu.
Btw linux in common is very strict to open standards and follow them, but some products follow them a bit more lazy. And provide individual specifications only to Microsoft Windows.
@megavolt Thanks. I also took a look at that article. I tried values in the of range of 40-45hz and it only worked with 42-44hz. However, there is a consistent lag so I can assume that the linux driver (mesa) for this specific graphics card doesn’t support 2560x1080 at 60 hz.
Once again, thanks a lot !! Time to move on.
P.S. Any suggestion for a different graphics card that has confirmed support for 2560x1080 at 60 hz in Linux ? Nothing fancy, I’m not into gaming.
According to this article: hwiki_archlinux_org/index.php/ATI#QHD_.2F_UHD_.2F_4k_support_over_HDMI_for_older_Radeon_cards
Older cards have their pixel clock limited to 165MHz for HDMI.
So the first number after Modeline “2560x1080x53.92” can’t be over 165 otherwise you get a black screen. An alternative, as described in the article, is to re compile the kernel and modify the radeon.hdmimhz parameter as posted in this other elstel_org/software/hunt-for-4K-UHD-2160p.html.en