Cannot get screen resolution I want (AMD Turks XT)

[Zylann]

Hello,

I just installed Linux Mint 17 Cinnamon. Everything seems ok, however I cannot find my screen resolution in the configuration panel.
From what I know, my screen has a resolution of 1680x1050 (which is not so common, I think).

I had to enable the proprietary drivers from ATI to get more resolutions (I am now using 1600x1200), but even by searching the options of the ATI Catalyst Control Panel I couldn't find a way to get a pixel-perfect config

Output of inxi -Fxz:

Code: Select all

System:    Host: marc-XPS-8300 Kernel: 3.13.0-24-generic x86_64 (64 bit, gcc: 4.8.2) 
           Desktop: Gnome Distro: Linux Mint 17 Qiana
Machine:   System: Dell product: XPS 8300
           Mobo: Dell model: 0Y2MRG version: A00 Bios: Dell version: A06 date: 10/17/2011
CPU:       Quad core Intel Core i5-2320 CPU (-MCP-) cache: 6144 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 23944.6 
           Clock Speeds: 1: 1600.00 MHz 2: 1600.00 MHz 3: 1600.00 MHz 4: 1600.00 MHz
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Turks XT [Radeon HD 6670/7670] bus-ID: 01:00.0 
           X.Org: 1.15.1 drivers: ati,fglrx (unloaded: fbdev,vesa,radeon) Resolution: 1600x1200@60.0hz 
           GLX Renderer: AMD Radeon HD 6670 GLX Version: 4.3.12798 - CPC 13.35.1005 Direct Rendering: Yes
Audio:     Card-1: Intel 6 Series/C200 Series Chipset Family High Definition Audio Controller driver: snd_hda_intel bus-ID: 00:1b.0
           Card-2: Advanced Micro Devices [AMD/ATI] Turks/Whistler HDMI Audio [Radeon HD 6000 Series] driver: snd_hda_intel bus-ID: 01:00.1
           Card-3: Roland EDIROL UA-25 driver: USB Audio usb-ID: 0582:0074
           Sound: Advanced Linux Sound Architecture ver: k3.13.0-24-generic
Network:   Card-1: Broadcom BCM4313 802.11bgn Wireless Network Adapter driver: bcma-pci-bridge bus-ID: 02:00.0
           IF: wlan0 state: up mac: <filter>
           Card-2: Broadcom NetLink BCM57788 Gigabit Ethernet PCIe driver: tg3 ver: 3.134 bus-ID: 03:00.0
           IF: eth0 state: down mac: <filter>
Drives:    HDD Total Size: 1001.2GB (54.9% used) 1: id: /dev/sda model: ST31000524AS size: 1000.2GB 
           2: id: /dev/sdb model: SD/MMC size: 1.0GB 
Partition: ID: / size: 67G used: 4.8G (8%) fs: ext4 ID: swap-1 size: 8.57GB used: 0.00GB (0%) fs: swap 
RAID:      No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors:   System Temperatures: cpu: 38.0C mobo: N/A 
           Fan Speeds (in rpm): cpu: N/A 
Info:      Processes: 171 Uptime: 53 min Memory: 973.3/7968.1MB Runlevel: 2 Gcc sys: 4.8.2 Client: Shell inxi: 1.8.4 

[PatH57]

Hi,

what's the model of your monitor?

[Zylann]

My monitor is an Acer AL2202W.

[eanfrid]

Its native perfectly fitting resolution is 1680x1050. You should not use any other resolution. Anything else will be interpolated and then either blurry or eye-hurting.

I have a 23" with 1680x1050 too and 1600x1200 gives me nothing else but headaches.

[Zylann]

eanfrid: I know, the problem is I can't choose this best resolution, it is not present in the list.

[PatH57]

Save a backup copy of xorg.conf in case this doesn't work.

Code: Select all

sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf.BAK

Code: Select all

sudo aticonfig --initial

or:

Code: Select all

sudo amdconfig --initial

reboot

Use the Catalyst Control Center to make final adjustments to your monitor setup. If, after rebooting, you are presented with the message "Could not apply the stored configuration for monitors", do not be alarmed. It simply means that you will have to use the Catalyst Control Center to configure your monitors as you should even in the case where this warning is not shown.

[Zylann]

Ok, in the meantime I did something else:
I used cvt to generate a modeline for 1680x1050 60Hz, then I added it with xrandr.
Then, the resolution is now shown in the AMD Catalyst Control Center. I choosed it and it worked!
However when I log off and log back in, the 1600x1200 resolution came back...

I then tried your commands to see if something different happens, but nothing special occurred.
I booted, logged and then my resolution was still 1600x1200. I reset 1680x1050, but once I re-login it forgets my choice.

[PatH57]

did you

Use the Catalyst Control Center

to make the changes?

[Zylann]

Yes, in each case I used it to make resolution changes.

[eanfrid]

FWIW do you have a DVI-VGA converter to plug in your VGA cable on the DVI output of the card ? The monitor may be badly advertising its own supported resolutions through EDID and perhaps using the DVI output of the card would fix this problem.

[Zylann]

Unfortunately, I don't have a DVI-VGA converter.
Actually it seems to me it's a software configuration problem, because I just noticed the login screen seems to have the right resolution. But when I log in the screen gets blurry with 1600x1200.
So basically, I can get my resolution now, but I can't make it stay...

[DrHu]

It doesn't stay/stick if you have an edited /etc/X11/xorg.conf file setup ??
--with the mode(s)) you need
https://wiki.ubuntu.com/X/Config/Resolution