Display port resolution stuck at 640x480

hello Garuda Linux Team

I have connected my two monitors , both monitors have same resolution , but i recognize that dp port screen is stuck at 640x480 resolution ,
By taking help from internet i have turned my resolution correctly but thats dont work after reboot and the picture quality after using custom resolution is not good.
And at the time of rebooting , my both monitors switched to the small resolution.

Can we have your inxi -Faz

1 Like

actually i know that i have to put , but i dont remember the command at that time..

System:    Kernel: 5.14.16-zen1-1-zen x86_64 bits: 64 compiler: gcc v: 11.1.0
parameters: BOOT_IMAGE=/vmlinuz-linux-zen root=UUID=4147f307-19d9-4a26-81d3-f8eb9583a645 rw
[email protected] quiet splash rd.udev.log_priority=3 vt.global_cursor_default=0
systemd.unified_cgroup_hierarchy=1 resume=UUID=d458f4c1-8188-46ca-8d76-52ff04ca7324 loglevel=3
Desktop: KDE Plasma 5.23.2 tk: Qt 5.15.2 info: latte-dock wm: kwin_x11 vt: 1 dm: SDDM
Distro: Garuda Linux base: Arch Linux
Machine:   Type: Desktop Mobo: Gigabyte model: H310M S2 2.0 v: x.x serial: <filter>
UEFI-[Legacy]: American Megatrends v: F11 date: 03/08/2019
CPU:       Info: 6-Core model: Intel Core i5-9400F bits: 64 type: MCP arch: Kaby Lake note: check
family: 6 model-id: 9E (158) stepping: A (10) microcode: EA cache: L2: 9 MiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 34798
Speed: 3519 MHz min/max: 800/4100 MHz Core speeds (MHz): 1: 3519 2: 3715 3: 3700 4: 3649
5: 3829 6: 3998
Vulnerabilities: Type: itlb_multihit status: KVM: VMX disabled
Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT disabled
Type: mds mitigation: Clear CPU buffers; SMT disabled
Type: meltdown mitigation: PTI
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2
mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: disabled, RSB filling
Type: srbds mitigation: Microcode
Type: tsx_async_abort status: Not affected
Graphics:  Device-1: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] vendor: Gigabyte
driver: amdgpu v: kernel bus-ID: 01:00.0 chip-ID: 1002:67df class-ID: 0300
Display: x11 server: X.Org 1.20.13 compositor: kwin_x11 driver: loaded: amdgpu,ati
unloaded: modesetting alternate: fbdev,vesa display-ID: :0 screens: 1
Screen-1: 0 s-res: 2006x768 s-dpi: 96 s-size: 530x203mm (20.9x8.0") s-diag: 568mm (22.3")
Monitor-1: DisplayPort-0 res: 640x480 hz: 60
Monitor-2: HDMI-A-0 res: 1366x768 hz: 60 dpi: 85 size: 410x230mm (16.1x9.1")
diag: 470mm (18.5")
OpenGL: renderer: Radeon RX 570 Series (POLARIS10 DRM 3.42.0 5.14.16-zen1-1-zen LLVM 12.0.1)
v: 4.6 Mesa 21.2.4 direct render: Yes
Audio:     Device-1: Intel 200 Series PCH HD Audio vendor: Gigabyte driver: snd_hda_intel v: kernel
bus-ID: 00:1f.3 chip-ID: 8086:a2f0 class-ID: 0403
Device-2: AMD Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] vendor: Gigabyte
driver: snd_hda_intel v: kernel bus-ID: 01:00.1 chip-ID: 1002:aaf0 class-ID: 0403
Device-3: JMTek LLC. USB PnP Audio Device type: USB driver: hid-generic,snd-usb-audio,usbhid
bus-ID: 1-1:2 chip-ID: 0c76:1694 class-ID: 0300
Sound Server-1: ALSA v: k5.14.16-zen1-1-zen running: yes
Sound Server-2: JACK v: 1.9.19 running: no
Sound Server-3: PulseAudio v: 15.0 running: no
Sound Server-4: PipeWire v: 0.3.39 running: yes
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Gigabyte driver: r8169
v: kernel port: d000 bus-ID: 05:00.0 chip-ID: 10ec:8168 class-ID: 0200
IF: enp5s0 state: down mac: <filter>
Device-2: Ralink MT7601U Wireless Adapter type: USB driver: mt7601u bus-ID: 1-7:6
chip-ID: 148f:7601 class-ID: 0000 serial: <filter>
IF: wlp0s20f0u7 state: up mac: <filter>
Drives:    Local Storage: total: 461.73 GiB used: 41.81 GiB (9.1%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/sda maj-min: 8:0 vendor: Western Digital model: WDS480G2G0A-00JH30 size: 447.14 GiB
block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s type: SSD serial: <filter> rev: 0000
scheme: MBR
ID-2: /dev/sdb maj-min: 8:16 type: USB vendor: SanDisk model: Cruzer Blade size: 14.59 GiB
block-size: physical: 512 B logical: 512 B type: N/A serial: <filter> rev: 1.00
SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
Partition: ID-1: / raw-size: 137 GiB size: 137 GiB (100.00%) used: 41.58 GiB (30.4%) fs: btrfs
dev: /dev/sda4 maj-min: 8:4
ID-2: /boot raw-size: 579 MiB size: 577.8 MiB (99.80%) used: 238.2 MiB (41.2%) fs: vfat
dev: /dev/sda1 maj-min: 8:1
ID-3: /home raw-size: 137 GiB size: 137 GiB (100.00%) used: 41.58 GiB (30.4%) fs: btrfs
dev: /dev/sda4 maj-min: 8:4
ID-4: /var/log raw-size: 137 GiB size: 137 GiB (100.00%) used: 41.58 GiB (30.4%) fs: btrfs
dev: /dev/sda4 maj-min: 8:4
ID-5: /var/tmp raw-size: 137 GiB size: 137 GiB (100.00%) used: 41.58 GiB (30.4%) fs: btrfs
dev: /dev/sda4 maj-min: 8:4
Swap:      Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default)
ID-1: swap-1 type: partition size: 16.6 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sda2
maj-min: 8:2
ID-2: swap-2 type: zram size: 7.71 GiB used: 2 MiB (0.0%) priority: 100 dev: /dev/zram0
Sensors:   System Temperatures: cpu: 27.8 C mobo: 16.8 C gpu: amdgpu temp: 46.0 C
Fan Speeds (RPM): N/A gpu: amdgpu fan: 790
Info:      Processes: 259 Uptime: 20m wakeups: 0 Memory: 7.71 GiB used: 2.5 GiB (32.4%) Init: systemd
v: 249 tool: systemctl Compilers: gcc: 11.1.0 clang: 12.0.1 Packages: pacman: 1318 lib: 342
Shell: fish v: 3.3.1 default: Bash v: 5.1.8 running-in: konsole inxi: 3.3.08

It would be nice to be a bit more specific here...

2 Likes

the resolution dont remain same after reboot and the graphics quality is not looks like
as it has to be.(it is blury)(it is only happening with the dp port)

Have you already checked the Arch wiki?
https://wiki.archlinux.org/title/Multihead

3 Likes

Troubleshooting graphics issues is really not something I'm great at, but I noticed a couple of things that might be worth altering.

Monitor-2: HDMI-A-0 res: 1366x768:
This^^^ seems an odd resolution to choose unless you were using an older laptop (and you're not).

Have you tried swapping the cabling for monitor 1 & 2?

I would suggest running both monitors with the same type of cabling (and resolution) if possible). Using either 2 HDMI cables, or 2 DP cables can sometimes help eliminate issues (if that is supported).

Good luck.

4 Likes

i tired swapping cables , both monitors are working with hdmi fine, but my graphic has only 1 hdmi port and 3 dispaly port.

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