I just installed mint and I am having this problem I have a Samsung SyncMaster 753DFX monitor connected with a VGA to DVI adaptor and I have an old AMD Radeon X1550 GPU, the monitor's native resolution is 1280x1024 but the max resolution in the display app is 1024x768 and it shows the monitor as "Unknown" I tried to set the resolution in the terminal using
xrandr --output DVI-0 --mode 1280x1024
but it says
xrandr: cannot find mode 1280x1024
I didn't find any other way to change the resolution so I came here.
-System info:
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System: Kernel: 5.4.0-74-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 5.0.4
wm: muffin dm: LightDM Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal
Machine: Type: Server System: HP product: ProLiant DL180 G6 v: N/A serial: <filter> Chassis:
type: 23 serial: <filter>
Mobo: N/A model: N/A serial: N/A BIOS: HP v: O33 date: 02/01/2012
CPU: Topology: 2x 6-Core model: Intel Xeon X5670 bits: 64 type: MT MCP SMP arch: Nehalem
rev: 2 L2 cache: 24.0 MiB
flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 70403
Speed: 1650 MHz min/max: 1600/2933 MHz Core speeds (MHz): 1: 1623 2: 1663 3: 1618
4: 1644 5: 1679 6: 1603 7: 1673 8: 1623 9: 1633 10: 1664 11: 1609 12: 1619
Graphics: Device-1: AMD RV505 [Radeon X1550 64-bit] vendor: PC Partner Limited driver: radeon
v: kernel bus ID: 07:00.0 chip ID: 1002:7147
Display: x11 server: X.Org 1.20.9 driver: ati,radeon unloaded: fbdev,modesetting,vesa
resolution: 1024x768~60Hz
OpenGL: renderer: ATI RV515 v: 2.1 Mesa 20.2.6 direct render: Yes
Audio: Device-1: Intel type: USB driver: hid-generic,snd-usb-audio,usbhid bus ID: 2-3.1.4:6
chip ID: 8086:0808
Sound Server: ALSA v: k5.4.0-74-generic
Drives: Local Storage: total: 447.13 GiB used: 271.35 GiB (60.7%)
ID-1: /dev/sda vendor: Kingston model: SA400S37480G size: 447.13 GiB speed: 3.0 Gb/s
serial: <filter>
Partition: ID-1: / size: 163.10 GiB used: 9.06 GiB (5.6%) fs: ext4 dev: /dev/sda5
Sensors: System Temperatures: cpu: 45.0 C mobo: N/A
Fan Speeds (RPM): N/A
Repos: No active apt repos in: /etc/apt/sources.list
Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
1: deb http: //packages.linuxmint.com uma main upstream import backport #id:linuxmint_main
2: deb http: //archive.ubuntu.com/ubuntu focal main restricted universe multiverse
3: deb http: //archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
4: deb http: //archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
5: deb http: //security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
6: deb http: //archive.canonical.com/ubuntu/ focal partner
Info: Processes: 276 Uptime: 2h 02m Memory: 7.76 GiB used: 2.73 GiB (35.1%) Init: systemd
v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Client: Unknown python3.8 client
inxi: 3.0.38