• Can't get 2560x1080 resolution to work


    Hello.
    GPU: Radeon HD 6870
    Monitor: LG 29UM59-P

    I’m struggling with setting the 2560x1080 resolution on Antergos. At first, there is not even 2560x1080 option in display menu, so I’ve read I need to add a custom resolution with xrandr. I did that, and yes - it resized to 2560x1080, but the screen was all blurry and unusable. Do you guys have some ideas? Do I need to download some special AMD packages or something? Please let me know.

    inxi -Fxzc0 output:

    [[email protected] Desktop]# inxi -Fxzc0
    Resuming in non X mode: glxinfo not found. For package install advice run: inxi --recommends
    System:    Host: erzis Kernel: 4.14.15-1-ARCH x86_64 bits: 64 gcc: 7.2.1 Console: tty 0
               Distro: Antergos Linux
    Machine:   Device: desktop Mobo: Gigabyte model: B85M-D3H-A v: x.x serial: N/A
               UEFI: American Megatrends v: F1 date: 03/30/2015
    CPU:       Quad core Intel Core i5-4590 (-MCP-) arch: Haswell rev.3 cache: 6144 KB
               flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 26349
               clock speeds: max: 3700 MHz 1: 2559 MHz 2: 2579 MHz 3: 1708 MHz 4: 2491 MHz
    Graphics:  Card-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
               bus-ID: 00:02.0
               Card-2: Advanced Micro Devices [AMD/ATI] Barts XT [Radeon HD 6870] bus-ID: 01:00.0
               Display Server: X.org 1.19.6 drivers: modesetting (unloaded: fbdev,vesa)
               tty size: 103x27 Advanced Data: N/A for root
    Audio:     Card-1 Intel 8 Series/C220 Series High Def. Audio Controller
               driver: snd_hda_intel bus-ID: 00:1b.0
               Card-2 Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
               driver: snd_hda_intel bus-ID: 00:03.0
               Card-3 Advanced Micro Devices [AMD/ATI] Barts HDMI Audio [Radeon HD 6790/6850/6870 / 7720 OEM]
               driver: snd_hda_intel bus-ID: 01:00.1
               Card-4 Logitech HD Webcam C910 driver: USB Audio usb-ID: 001-002
               Sound: Advanced Linux Sound Architecture v: k4.14.15-1-ARCH
    Network:   Card: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
               driver: r8169 v: 2.3LK-NAPI port: d000 bus-ID: 03:00.0
               IF: enp3s0 state: up speed: 100 Mbps duplex: full mac: <filter>
    Drives:    HDD Total Size: 1120.2GB (0.6% used)
               ID-1: /dev/sda model: KINGSTON_SV300S3 size: 120.0GB
               ID-2: /dev/sdb model: ST31000524AS size: 1000.2GB
    Partition: ID-1: / size: 64G used: 5.6G (9%) fs: ext4 dev: /dev/sdb4
               ID-2: /home size: 29G used: 199M (1%) fs: ext4 dev: /dev/sdb6
    Sensors:   System Temperatures: cpu: 29.8C mobo: 27.8C gpu: 49.0
               Fan Speeds (in rpm): cpu: N/A
    Info:      Processes: 161 Uptime: 35 min Memory: 2088.4/11912.9MB Init: systemd Gcc sys: 7.3.0
               Client: Shell (bash 4.4.181) inxi: 2.3.56
    
    
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