Screen flashing along the edges in some websites or parts of videos

pepper · 2022-10-25 20:59:58

Hello, since 2-3 weeks I have a problem that happens each time I open an image/video/website (across different software, brave, firefox, mpv etc). So when I see a part of video that is maybe dark or shady (idk how to reproduce) the corners of the screen start flashing (it keep increasing frequency and intensity of flashes until I pause the video or change website/tab).
The problem happens each day and more often with specific graphical interfaces, it seems to happen every time I open the facebook website for example (but only in the homepage) and so on a lot of cases.

I use xfce, xorg, picom, nvidia dkms, and the standard kernel.

This is my picom config: https://bin.disroot.org/?7b895cabcb17a4 … vAnVj29YrB

seth · 2022-10-25 21:20:16

Please post your xorg log and the output of "xrandr -q", https://wiki.archlinux.org/title/Xorg#General
Does it also happen w/o picom?

pepper · 2022-10-26 08:39:41

xandr -q: https://bin.disroot.org/?7f1e98a1ebe120 … EeezQXfz4w
xorg log: https://bin.disroot.org/?ae11e3eb884982 … sPEsvbaYEp

It happens also without picom: I tried to open the facebook homepage, the screen started flashing, so I killed the picom process and it keeps flashing, so I killed browser, it stopped flashing, then I reopened browser in facebook homepage and it stared flashing again. The same problem in some specific dark scenes of movies using mpv and vlc (but using vlc it seems flashing differently)

Last edited by pepper (2022-10-26 08:40:48)

seth · 2022-10-26 12:41:08

What happens if you turn the monitor off and back on?
What if you drive it at a lower resolution (xrandr --output DP-2 --mode 1920x1200)?
What if you move the GPU to maximum performance in nvidia-settings?

I suspect either the backlight or the signal.

pepper · 2022-10-26 15:02:52

seth wrote:

What happens if you turn the monitor off and back on?

nothing, it keeps flashing

seth wrote:

What if you drive it at a lower resolution (xrandr --output DP-2 --mode 1920x1200)?

it apparently stops flashing but I should use it in a lower resolution (losing icons positions etc) for at least a day to be sure that it will not flash anymore

seth wrote:

What if you move the GPU to maximum performance in nvidia-settings?

I have 3 PowerMizer settings: Auto, Adaptive, Prefer Maximum Performance. It was in auto, I set in maximum performance and nothing changed, it keeps flashing

I recorder a 25sec video using my smartphone (because the flashing can't be recorded via software, using OBS or SimpleScreenRecorder), the flashing start only with the facebook GUI (or in specific scenes of videos, maybe in dark scenes when the contrast is high).
The problem happens only in this arch linux install, I tested debian and windows without problems

Video: https://dropmefiles.com/0VMBq

Last edited by pepper (2022-10-26 15:13:09)

seth · 2022-10-26 15:12:13

Try to add and use this modeline

% cvt12 2560 1440 60 -b
# 2560x1440 @ 60.000 Hz Reduced Blank (CVT) field rate 60.000 Hz; hsync: 88.860 kHz; pclk: 234.59 MHz
Modeline "2560x1440_60.00_rb2"  234.59  2560 2568 2600 2640  1440 1467 1475 1481 +hsync -vsync

https://wiki.archlinux.org/title/Xrandr … esolutions

Also post your edid

edid-decode < /sys/class/drm/card0-DP-2/edid

You'll need https://aur.archlinux.org/packages/edid-decode-git and "nvidia-drm.modeset=1" in the kernel commandline.

pepper · 2022-10-26 15:21:49

Could you tell me more about the commands to use and how to put "nvidia-drm.modeset=1" in the kernel commandline? I also don't have cvt12 installed

Thanks for the patience

Last edited by pepper (2022-10-26 15:22:13)

seth · 2022-10-26 15:28:34

https://wiki.archlinux.org/title/Kernel_parameters
You don't need cvt12, I posted the generated output - only the modeline itself is relevant.
But ftr, https://aur.archlinux.org/packages/cvt12-git

Edit: the leading "%" is the default zsh prompt, in case somebody wonders

Last edited by seth (2022-10-26 15:35:56)

pepper · 2022-10-26 18:43:57

xrandr --newmode "2560x1440_60.00_rb2" 234.59 2560 2568 2600 2640 1440 1467 1475 1481 +hsync -vsync
then
xrandr --addmode DP-2 2560x1440_60.00_rb2

X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  43
  Current serial number in output stream:  44

I don't know why this error.

This is my xrandr output:

Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 connected 2560x1440+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
   2560x1440     59.95*+
   2048x1152     60.00  
   1920x1200     59.88  
   1920x1080     60.00    59.94    50.00    29.97    25.00    23.98  
   1680x1050     59.95  
   1600x1200     60.00  
   1280x1024     75.02    60.02  
   1280x720      60.00    59.94    50.00  
   1200x960      59.90  
   1152x864      75.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    59.94    59.93  
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)
  2560x1440_60.00_rb2 (0x212) 234.590MHz +HSync -VSync
        h: width  2560 start 2568 end 2600 total 2640 skew    0 clock  88.86KHz
        v: height 1440 start 1467 end 1475 total 1481           clock  60.00Hz

Last edited by pepper (2022-10-26 18:44:46)

seth · 2022-10-26 19:36:05

The driver rejects the modeline

seth wrote:

Also post your edid
edid-decode < /sys/class/drm/card0-DP-2/edid
You'll need https://aur.archlinux.org/packages/edid-decode-git and "nvidia-drm.modeset=1" in the kernel commandline.

pepper · 2022-10-26 20:30:14

edid-decode < /sys/class/drm/card0-DP-2/edid
returns:

zsh: file o directory non esistente: /sys/class/drm/card0-DP-2/edid

I also tried edid-decode < /sys/class/drm/card0/edid because /sys/class/drm has only card0 and renderD128 folders but the error is the same: missing folder

Last edited by pepper (2022-10-26 20:40:04)

seth · 2022-10-26 20:37:54

cat /proc/cmdline

pepper · 2022-10-26 20:40:51

seth wrote:

cat /proc/cmdline

BOOT_IMAGE=/vmlinuz-linux-lts root=/dev/mapper/volgroup0-lv_root rw cryptdevice=UUID=49bb1478-8b71-49fb-9386-cccc6a65b04c:encrypted_lvm root=/dev/volgroup0/lv_root loglevel=3 quiet

if it can help I found other posts in reddit about the flashing problem https://www.reddit.com/r/archlinux/comm … ixed_with/ maybe it's a known kernel bug

seth · 2022-10-26 21:07:45

The EDID query fails because "nvidia-drm.modeset=1" is not in your kernel commandline.

pepper · 2022-10-27 07:53:57

sudo sysctl nvidia-drm.modeset=1

sysctl: cannot stat /proc/sys/nvidia-drm/modeset: File o directory non esistente

d.ALT · 2022-10-27 08:06:03

<EDIT>
@seth: OK, thanks!
</EDIT>

pepper wrote:

sudo sysctl nvidia-drm.modeset=1

sysctl: cannot stat /proc/sys/nvidia-drm/modeset: File o directory non esistente

Typo: '-'
Use underscore (ASCII Code 95):

nvidia_drm.modeset=1

https://wiki.archlinux.org/title/NVIDIA … de_setting

Last edited by d.ALT (2022-10-27 08:29:30)

seth · 2022-10-27 08:08:09

This is not how this works, the kernel parameter activates a module parameter.
Please revisit https://wiki.archlinux.org/title/Kernel_parameters and add it for your bootloader.

Edit, @d.Alt : that's not gonna work, you'd have to re-load the module.

Last edited by seth (2022-10-27 08:15:10)

pepper · 2022-10-27 08:19:16

edid-decode < /sys/class/drm/card0-DP-2/edid

edid-decode (hex):

00 ff ff ff ff ff ff 00 10 ac 66 d0 53 4a 4b 31
18 1b 01 04 a5 3c 22 78 3e 44 55 a9 55 4d 9d 26
0f 50 54 a5 4b 00 b3 00 d1 00 71 4f a9 40 81 80
77 80 01 01 01 01 56 5e 00 a0 a0 a0 29 50 30 20
35 00 55 50 21 00 00 1a 00 00 00 ff 00 47 48 38
35 44 37 36 47 31 4b 4a 53 0a 00 00 00 fc 00 44
45 4c 4c 20 55 32 37 31 35 48 0a 20 00 00 00 fd
00 38 56 1e 71 1e 01 0a 20 20 20 20 20 20 01 38

02 03 1c f1 4f 10 05 04 03 02 07 16 01 14 1f 12
13 20 21 22 23 09 07 07 83 01 00 00 02 3a 80 18
71 38 2d 40 58 2c 45 00 55 50 21 00 00 1e 01 1d
80 18 71 1c 16 20 58 2c 25 00 55 50 21 00 00 9e
01 1d 00 72 51 d0 1e 20 6e 28 55 00 55 50 21 00
00 1e 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 55 50
21 00 00 18 48 3f 00 ca 80 80 30 40 1a 50 13 00
55 50 21 00 00 1e 00 00 00 00 00 00 00 00 00 fe

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: DEL
    Model: 53350
    Serial Number: 827017811
    Made in: week 24 of 2017
  Basic Display Parameters & Features:
    Digital display
    Bits per primary color channel: 8
    DisplayPort interface
    Maximum image size: 60 cm x 34 cm
    Gamma: 2.20
    DPMS levels: Off
    Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
    Default (sRGB) color space is primary color space
    First detailed timing includes the native pixel format and preferred refresh rate
  Color Characteristics:
    Red  : 0.6611, 0.3320
    Green: 0.3017, 0.6132
    Blue : 0.1494, 0.0595
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    DMT 0x12:  1024x768    75.028582 Hz   4:3     60.023 kHz     78.750000 MHz
    DMT 0x24:  1280x1024   75.024675 Hz   5:4     79.976 kHz    135.000000 MHz
  Standard Timings:
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x45:  1920x1200   59.884600 Hz  16:10    74.556 kHz    193.250000 MHz
    DMT 0x15:  1152x864    75.000000 Hz   4:3     67.500 kHz    108.000000 MHz
    DMT 0x33:  1600x1200   60.000000 Hz   4:3     75.000 kHz    162.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    GTF     :  1200x960    60.000000 Hz   5:4     59.640 kHz     95.424000 MHz
  Detailed Timing Descriptors:
    DTD 1:  2560x1440   59.950550 Hz  16:9     88.787 kHz    241.500000 MHz (597 mm x 336 mm)
                 Hfront   48 Hsync  32 Hback   80 Hpol P
                 Vfront    3 Vsync   5 Vback   33 Vpol N
    Display Product Serial Number: 'GH85D76G1KJS'
    Display Product Name: 'DELL U2715H'
    Display Range Limits:
      Monitor ranges (Bare Limits): 56-86 Hz V, 30-113 kHz H, max dotclock 300 MHz
  Extension blocks: 1
Checksum: 0x38

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   2:   720x480    59.940060 Hz   4:3     31.469 kHz     27.000000 MHz
    VIC   7:  1440x480i   59.940060 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC  22:  1440x576i   50.000000 Hz  16:9     15.625 kHz     27.000000 MHz
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC  32:  1920x1080   24.000000 Hz  16:9     27.000 kHz     74.250000 MHz
    VIC  33:  1920x1080   25.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  34:  1920x1080   30.000000 Hz  16:9     33.750 kHz     74.250000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 48 44.1 32
      Supported sample sizes (bits): 24 20 16
  Speaker Allocation Data Block:
    FL/FR - Front Left/Right
  Detailed Timing Descriptors:
    DTD 2:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (597 mm x 336 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 3:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz (597 mm x 336 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    2 Vsync   5 Vback   15 Vpol P Vfront +0.5 Odd Field
                 Vfront    2 Vsync   5 Vback   15 Vpol P Vback  +0.5 Even Field
    DTD 4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz (597 mm x 336 mm)
                 Hfront  110 Hsync  40 Hback  220 Hpol P
                 Vfront    5 Vsync   5 Vback   20 Vpol P
    DTD 5:   720x480    59.940060 Hz   3:2     31.469 kHz     27.000000 MHz (597 mm x 336 mm)
                 Hfront   16 Hsync  62 Hback   60 Hpol N
                 Vfront    9 Vsync   6 Vback   30 Vpol N
    DTD 6:  2048x1152   60.000000 Hz  16:9     72.000 kHz    162.000000 MHz (597 mm x 336 mm)
                 Hfront   26 Hsync  80 Hback   96 Hpol P
                 Vfront    1 Vsync   3 Vback   44 Vpol P
Checksum: 0xfe  Unused space in Extension Block: 9 bytes

seth · 2022-10-27 08:43:33

    DTD 1:  2560x1440   59.950550 Hz  16:9     88.787 kHz    241.500000 MHz (597 mm x 336 mm)
                 Hfront   48 Hsync  32 Hback   80 Hpol P
                 Vfront    3 Vsync   5 Vback   33 Vpol N

Is the standard cvt1 reduced blanking mode

% cvt12 2560 1440 60 -r
# 2560x1440 @ 60.000 Hz Reduced Blank (CVT) field rate 59.951 Hz; hsync: 88.787 kHz; pclk: 241.50 MHz
Modeline "2560x1440_60.00_rb1"  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync

so there isn't mauch to gain (7MHz difference, little but maybe enough. The signal isn't even touching HBR, though.)

Has the flashing shown up w/ the 1920x1200 mode so far?
You could try
/etc/X11/xorg.conf.d/20-nvidia.conf

Section "Device"
    Identifier    "Default nvidia Device"
    Driver        "nvidia"
    Option    "ModeValidation"	"AllowNonEdidModes"

pepper · 2022-10-27 09:05:27

seth wrote:

Has the flashing shown up w/ the 1920x1200 mode so far?

It seems not, but I can't test a 1200p resolution for a long time because I can't use other software I usually use etc. I tested this resolution for around 10min and it seems the problem doesn't show up

Do you know if it's a problem that will be fixed? It's a kernel related problem? I'm not sure what is not working

seth wrote:

You could try
/etc/X11/xorg.conf.d/20-nvidia.conf

Section "Device"
    Identifier    "Default nvidia Device"
    Driver        "nvidia"
    Option    "ModeValidation"	"AllowNonEdidModes"

When I create this file, LDM login manger doesn't run anymore at boot.

Last edited by pepper (2022-10-27 09:17:22)

seth · 2022-10-27 09:20:19

Sorry, I truncated the file:

Section "Device"
    Identifier    "Default nvidia Device"
    Driver        "nvidia"
    Option    "ModeValidation"	"AllowNonEdidModes"
EndSection

This might allow you to add the cvt12 modeline.

I missed

The problem happens only in this arch linux install, I tested debian and windows without problems

You're saying you're using "nvidia dkms" but you're using the regular kernel (and later on apparently the LTS kernel) which have pre-built modules.
Is this https://archlinux.org/packages/extra/x8 … idia-dkms/ or https://archlinux.org/packages/extra/x8 … open-dkms/ ?

pepper · 2022-10-27 09:31:22

I'm using nvidia-dkms https://archlinux.org/packages/extra/x8 … idia-dkms/ and the flashing problems show up in both kernels (normal and LTS)

Just a curious fact: if I open facebook in dark mode, the screen flashes, everytime, but if I open facebook using the darkmode of Dark Reader (popular browser addon), it never flashes, I don't know what is the logic

Last edited by pepper (2022-10-27 09:41:21)

pepper · 2022-10-27 13:07:27

seth wrote:

Sorry, I truncated the file:

Section "Device"
    Identifier    "Default nvidia Device"
    Driver        "nvidia"
    Option    "ModeValidation"	"AllowNonEdidModes"
EndSection

I correctly added the file, then I executed these commands without errors:

xrandr --newmode "2560x1440_60.00_rb2"  234.59  2560 2568 2600 2640  1440 1467 1475 1481 +hsync -vsync

xrandr --addmode DP-2 2560x1440_60.00_rb2

xrandr --output DP-2 --mode 2560x1440_60.00_rb2

the screen is correctly "refreshed" after the latest command, but the flashing problem is not solved

Last edited by pepper (2022-10-27 13:10:09)

seth · 2022-10-27 13:16:06

Feared so - the difference between CVT1 and CVT12 RB isn't much

Try to blacklist "snd_hda_codec_hdmi", https://wiki.archlinux.org/title/Kernel … acklisting - use the /bin/true method and make sure it's not loaded - obviously we're grasping straws now…

pepper · 2022-10-27 13:58:00

Thanks for your perfect and fast support these >2 days, maybe I'll wait a few weeks for an update that will fix this bug or I'll write again in the forum if the problem changes.

Last edited by pepper (2022-10-27 13:58:53)

Arch Linux

#1 2022-10-25 20:59:58

Screen flashing along the edges in some websites or parts of videos

#2 2022-10-25 21:20:16

Re: Screen flashing along the edges in some websites or parts of videos

#3 2022-10-26 08:39:41

Re: Screen flashing along the edges in some websites or parts of videos

#4 2022-10-26 12:41:08

Re: Screen flashing along the edges in some websites or parts of videos

#5 2022-10-26 15:02:52

Re: Screen flashing along the edges in some websites or parts of videos

#6 2022-10-26 15:12:13

Re: Screen flashing along the edges in some websites or parts of videos

#7 2022-10-26 15:21:49

Re: Screen flashing along the edges in some websites or parts of videos

#8 2022-10-26 15:28:34

Re: Screen flashing along the edges in some websites or parts of videos

#9 2022-10-26 18:43:57

Re: Screen flashing along the edges in some websites or parts of videos

#10 2022-10-26 19:36:05

Re: Screen flashing along the edges in some websites or parts of videos

#11 2022-10-26 20:30:14

Re: Screen flashing along the edges in some websites or parts of videos

#12 2022-10-26 20:37:54

Re: Screen flashing along the edges in some websites or parts of videos

#13 2022-10-26 20:40:51

Re: Screen flashing along the edges in some websites or parts of videos

#14 2022-10-26 21:07:45

Re: Screen flashing along the edges in some websites or parts of videos

#15 2022-10-27 07:53:57

Re: Screen flashing along the edges in some websites or parts of videos

#16 2022-10-27 08:06:03

Re: Screen flashing along the edges in some websites or parts of videos

#17 2022-10-27 08:08:09

Re: Screen flashing along the edges in some websites or parts of videos

#18 2022-10-27 08:19:16

Re: Screen flashing along the edges in some websites or parts of videos

#19 2022-10-27 08:43:33

Re: Screen flashing along the edges in some websites or parts of videos

#20 2022-10-27 09:05:27

Re: Screen flashing along the edges in some websites or parts of videos

#21 2022-10-27 09:20:19

Re: Screen flashing along the edges in some websites or parts of videos

#22 2022-10-27 09:31:22

Re: Screen flashing along the edges in some websites or parts of videos

#23 2022-10-27 13:07:27

Re: Screen flashing along the edges in some websites or parts of videos

#24 2022-10-27 13:16:06

Re: Screen flashing along the edges in some websites or parts of videos

#25 2022-10-27 13:58:00

Re: Screen flashing along the edges in some websites or parts of videos

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