Issues with running my monitor at 75Hz, AMD RX 580

Gabriel Caddy

New Member
Hello,
I'm having an issue where i create a custom resolution using xrandr, i'm trying to set 1920x1080_75.00 which i did successfully, however when i try to enable that refresh rate me screen flickers horrifically, it makes me feel sick to look at it, so i wait for it to change back and then weird green lines flick up then away, i switch it to 50Hz then back again and it's fixed, any idea as to why this occurs, i'm running a ubuntu based distro, 18.04 lts (Zorin os 15).
Specs:
CPU : R5 1600x
GPU : RX 580
Thanks,
Gabriel John Caddy
 


Gabriel Caddy

New Member
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
HDMI-A-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.00*+ 50.00 59.94
1680x1050 59.88
1600x900 60.00
1280x1024 75.02 60.02
1440x900 60.00
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
832x624 74.55
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
1920x1080_75.00 74.91
DVI-D-0 disconnected (normal left inverted right x axis y axis)
 

Gabriel Caddy

New Member
I just changed my resolution from 1080x1920 to 1080x1920 and it happens, it seems to be that when i change resolution, so i went into the recovery terminal and reset my xrandr, forgetting that that resets everything, so now it outputs:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080
default connected primary 1920x1080+0+0 0mm x 0mm
1920x1080 0.00*
1920x1080_75.00 (0x3a1) 220.750MHz -HSync +VSync
h: width 1920 start 2064 end 2264 total 2608 skew 0 clock 84.64KHz
v: height 1080 start 1083 end 1088 total 1130 clock 74.91Hz
 

Gabriel Caddy

New Member

Gabriel Caddy

New Member
Module Size Used by
rfcomm 77824 4
vmw_vsock_vmci_transport 32768 0
vsock 36864 1 vmw_vsock_vmci_transport
vmw_vmci 65536 1 vmw_vsock_vmci_transport
cmac 16384 1
bnep 24576 2
edac_mce_amd 28672 0
kvm 630784 0
irqbypass 16384 1 kvm
crct10dif_pclmul 16384 1
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
snd_hda_codec_realtek 114688 1
uvcvideo 94208 0
snd_hda_codec_generic 77824 1 snd_hda_codec_realtek
videobuf2_vmalloc 20480 1 uvcvideo
ledtrig_audio 16384 2 snd_hda_codec_generic,snd_hda_codec_realtek
videobuf2_memops 20480 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
btusb 49152 0
snd_hda_codec_hdmi 53248 1
btrtl 20480 1 btusb
btbcm 16384 1 btusb
aesni_intel 372736 2
btintel 24576 1 btusb
videobuf2_common 45056 2 videobuf2_v4l2,uvcvideo
bluetooth 557056 33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
snd_usb_audio 233472 6
snd_hda_intel 49152 8
aes_x86_64 20480 1 aesni_intel
videodev 204800 3 videobuf2_v4l2,uvcvideo,videobuf2_common
crypto_simd 16384 1 aesni_intel
snd_usbmidi_lib 36864 1 snd_usb_audio
snd_hda_codec 135168 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel
snd_seq_midi 20480 0
snd_seq_midi_event 16384 1 snd_seq_midi
xpad 40960 0
glue_helper 16384 1 aesni_intel
media 53248 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
input_leds 16384 0
ecdh_generic 28672 2 bluetooth
joydev 28672 0
k10temp 16384 0
ff_memless 20480 1 xpad
snd_hda_core 86016 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_rawmidi 36864 2 snd_seq_midi,snd_usbmidi_lib
snd_hwdep 20480 2 snd_usb_audio,snd_hda_codec
wmi_bmof 16384 0
snd_pcm 102400 5 snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core
snd_seq 69632 2 snd_seq_midi,snd_seq_midi_event
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 36864 2 snd_seq,snd_pcm
snd 86016 41 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audio,snd_usbmidi_lib,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi
ccp 86016 0
soundcore 16384 1 snd
mac_hid 16384 0
sch_fq_codel 20480 2
parport_pc 36864 1
ppdev 24576 0
lp 20480 0
parport 53248 3 parport_pc,lp,ppdev
ip_tables 32768 0
x_tables 40960 1 ip_tables
autofs4 45056 2
hid_roccat_isku 16384 0
hid_roccat 16384 1 hid_roccat_isku
hid_roccat_common 16384 1 hid_roccat_isku
hid_generic 16384 0
usbhid 53248 0
hid 126976 4 usbhid,hid_roccat_isku,hid_generic,hid_roccat
chash 16384 0
amd_iommu_v2 20480 0
gpu_sched 32768 0
i2c_algo_bit 16384 0
ttm 102400 0
drm_kms_helper 180224 0
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
fb_sys_fops 16384 1 drm_kms_helper
drm 483328 3 gpu_sched,drm_kms_helper,ttm
r8169 86016 0
nvme 45056 0
i2c_piix4 28672 0
ahci 40960 3
realtek 20480 0
nvme_core 94208 1 nvme
libahci 32768 1 ahci
wmi 28672 1 wmi_bmof
gpio_amdpt 20480 0
gpio_generic 20480 1 gpio_amdpt
 

Gabriel Caddy

New Member
I was in the recovery kernel when i loaded into zorin os, so the graphics card was just a default output, i've come out and i've fixed the issue.
1). I reset xrandr by "xrandr -s 0"
2). Then "sudo gedit ~/.profile"
3). Deleted the lines to do with monitor overclock, then just followed the instructions again and they worked
Thanks for your help,
Gabriel Caddy
 

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