Sporadic flickering glitches on Ryzen 6850U, Radeon 680M

Brief summary of the problem:

A while after booting, i get flickering artifacts, mostly on the left side of the screen. They occur approximately every 20-60 seconds, and only last for some fractions of a second. They look similar to the artifacts show in the attached video in #2192, but are not that regular, and sometimes span a larger area of the screen.

I have not found a good way to trigger them by a specific action, but they seem to occur more often when e.g. switching tabs in Firefox or hovering over the file tree in vs-code until a tooltip appears. But this could also be coincidence, as they also appear when watching videos with mpv in fullscreen.

Switching between Xorg and Wayland does not make a difference, and i also tried switching from KDE to xfce.

However, while kernel versions 6.0, 6.1 and even 6.2.rc2 show the glitches, it seems that version 5.19.13 is not affected, I have not seen a single glitch with it.

Hardware description:

• CPU: AMD Ryzen 7 PRO 6850U
• GPU: Rembrandt, Radeon 680M
• System Memory: 16GB LPDDR5-6400
• Display(s): ThinkPad T14 Gen 3 (AMD) builtin display (WUXGA non-touch)
• Type of Display Connection: eDP

System information:

• Distro name and Version: arch
• Kernel version: linux 6.1.6.arch1-1
• AMD official driver version: mesa 22.3.3-1, xf86-video-amdgpu 22.0.0-1
• Desktop Environment: KDE 5.101.0 / Plasma 5.26.5

How to reproduce the issue:

• Boot with kernel 6.0, 6.1, 6.2rc2
• Open Firefox, any video player or vs-code
• Wait for flickering glitches to appear

Attached files:

Screenshots/video files

Since the glitches are not easily triggerable i was not able to take a video of them yet.

Log files (for system lockups / game freezes / crashes)

I can't see any driver/gpu related errors in the logs.

I also noticed it, it seems like a recent regression:

• 5.15.84-xanmod1 - works fine
• 5.15.87-xanmod1 - intermittent flickering
• 6.1.6 (ubuntu mainline ppa) - intermittent flickering
• 6.2-rc4 (ubuntu mainline ppa) - constant flickering

Dell G5 5505 4800H, BIOS 1.14.0, Linux Mint 21.1 (Ubuntu 22.04), Monitor: Dell U2720Q (4K) via USB-C (iGPU)

Flickering issue on 6.2-rc4:

The flickering affects approx. the bottom 60% of the screen.

2023-01-16_19.53.24

Can you bisect 5.15?

@agd5f - I can't bisect, but I'll test 5.15.85 and 5.15.86, so at least you can narrow it to a specific kernel version

@agd5f, I can reproduce the issue on 5.15.87, but not on 5.15.86.

I can reproduce the issue consistently by turning off the monitor (xset -display $DISPLAY dpms force off) and on again

in drivers/gpu/drm/amd the two things that stand out in 5.15.87:

78623b10fc9f drm/amdgpu: make display pinning more flexible (v2)
6363da2c854a drm/amdgpu: handle polaris10/11 overlap asics (v2)

We have another regression that was reported from 78623b10fc9f already, so if reverting this fixes it that's more reason for us to revert it.

added DC label

mentioned in issue #1222

I get a very similar problem on my R7 6800H CPU, but I've been getting this issue on and off for the last 4-5 months now. Setting the screen on a high refresh rate seems to exacerbate the problem.

The laptop is a Lenovo Legion 5 16" laptop, with 2 GPUs: 680M (igpu) and a RX 6700 (dgpu). Though I very rarely use the dgpu.

I'm on Fedora 37 (AMD) right now, though this was reproduced in Archlinux. Kernel: 6.1.6-200.fc37.x86_64 Laptop is currently on switchable graphics (iGPU by default)

The following video was taken a few months ago (October) but while the issue seems to be happening a bit less often it does happen, especially when there's alot of white on screen (Though that might be a false positive, just something I noticed. I may be wrong.)

video_2023-01-21_11-04-51

• 5.15.90 - Fixed
• 6.1.8 - Not fixed
• 6.2.0-rc5 - Not fixed

On 6.1.8 or 6.2-rc5, if you revert the commit for drm/amdgpu: make display pinning more flexible (v2), does that fix it?

@superm1 , sorry, I'm unable to compile kernels to test

I think this patch should fix it: agd5f/linux@40e9f3f0

That patch didn't fix it for 6.2-rc5

Does this patch fix it? 0001-drm-amd-display-disable-S-G-display-on-DCN-3.1.2-3.patch

@agd5f , yes, that fixes it for 6.2-rc5

Dell G5 5505, Ryzen 4800H, BIOS 1.14.0, Linux Mint 21.1 (Ubuntu 22.04), Monitor: Dell U2720Q (4K) via USB-C (iGPU)

@agd5f , actually, after more testing it still happens, the patch doesn't fix it

Can you attach your dmesg output?

You don't have a 680M, so that patch would not be applicable. Does this patch help?

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index fe66b7aec248..3d434e88accb 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1534,13 +1534,6 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
                            (adev->apu_flags & AMD_APU_IS_PICASSO))
                                init_data.flags.gpu_vm_support = true;
                        break;
-               case IP_VERSION(2, 1, 0):
-               case IP_VERSION(3, 0, 1):
-               case IP_VERSION(3, 1, 2):
-               case IP_VERSION(3, 1, 3):
-               case IP_VERSION(3, 1, 6):
-                       init_data.flags.gpu_vm_support = true;
-                       break;
                default:
                        break;
                }

@agd5f , I think it's working now, I'll report back if there's an issue.

dmesg

This patch fixes your specific chip. 0001-drm-amd-display-disable-S-G-display-on-DCN-2.1.0.patch

@agd5f , update: tested for 3 days, and no issues

@urld can you try this patch? https://gitlab.freedesktop.org/drm/amd/uploads/ec64b61069fa26cde72d44780ef7e892/0001-drm-amd-display-disable-S-G-display-on-DCN-3.1.2-3.patch

Applied the patch to 6.2-rc5 and for the last hour no flickering appeared. There was one very short glitch, where it looked like the entire screen was shifted to the right, but i was not able to reproduce it.

I'll continue using the patched kernel and report back in a few days.

I'll try to apply it to my laptop (As it's not my main computer) tonight. First time I compile a kernel, and I'm a bit green behind the ears and I'll have to check how to this on Fedora.

I also applied the patch to the official fedora 6.2-rc5 kernel and installed it. I'll be testing it this afternoon and report back.

Yeah I just had it happen. Did it for a small 5 seconds at most, couldn't grab my cell in time to make a video.

sudo lspci -v | grep "VGA" pcilib: Error reading /sys/bus/pci/devices/0000:00:08.3/label: Operation not permitted

03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 22 [Radeon RX 6700/6700 XT/6750 XT / 6800M] (rev cf) (prog-if 00 [VGA controller])

37:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt [Radeon 680M] (rev c8) (prog-if 00 [VGA controller])

(The 680M GPU is the one active by default btw)

So with the patch things got a lot better, but there are still a few glitches, however they are a bit different and happen less often.

As already described in my previous comment, sometimes the entire screen gets shifted to the right (very rare).

Additionally, sometimes a horizontal stripe spanning the entire width of the screen around the current cursor position flickers for a brief moment. This also happens very rarely.

mentioned in issue #2354 (closed)

mentioned in commit agd5f/linux@a5fb8e18

mentioned in commit agd5f/linux@d4270ce3

mentioned in commit agd5f/linux@2404f9b0

mentioned in commit agd5f/linux@f081cd4c

mentioned in commit agd5f/linux@077e9659

mentioned in commit agd5f/linux@877f26bf

I am sorry if this is not the right topic, but similar things occur on my laptop.

After boot the screen starts to flicker in white, and at some point it stays solid white, with only the mouse cursor visible and moving. The CPU is the same - Ryzen 6850u, coming with the integrated 680M, no dedicated GPU. The laptop is a 14' HP. The OS is Manjaro 6.1.9, new install. Everything was working fine for a week, right until today, when I removed the original 16GB ram (Kioxia) and slotted 2x32GB from Crucial. The laptop is driving two TVs - one 55' and one 32' via HDMI and USB-C->HDMI respectively. This is not helping much, as the problem persists on the dedicated display too. The drive is dual-boot with Win10 and the windows version doesn't have that problem whatsoever.

If after login I manage to switch off the laptop's display from the Display window and have only the bigger TV switched on then all is fine. But when I switch the second one the flickering starts happening.

I am willing to provide any and every information possible, if only I know how to extract it. I have few years of usage, but not much experience. And I've been on xUbuntu until a week ago on the older laptop.

Edit: I've just tried to capture it with a screen recorder, but it's not showing in the playback. Sadly I'll have to get it with a phone. Untitled_Project

I seem to be getting a similar issue on my 6800H on a Lenovo Legion 7 16". However, for me it only presents under very specific circumstances: with an external display connected (seemingly to the 680M, I don't recall it happening with anything else) and the internal display set to 165Hz instead of 60. It doesn't seem to present when the internal display is the only one connected, and never appears when the internal display is at 60Hz.

• Mesa version: 23.0.0
• Kernel 6.1.0-4
• Distro: Debian Sid/Unstable

MVI_2351.2

Let me know if there's anything I should test/provide.

I retested with the latest versions:

• 5.15.94 - Fixed
• 6.1.12 - Not fixed
• 6.2.0-rc8 - Not fixed

It seems so far the fix has only been merged to the 5.15 branch

On 6.2-rc8 can you please try amdgpu.sg_display=0

@superm1 Yes, that seems to work. I'll update if there any issues.

Can you try without amdgpu.sg_display=0, and apply the following patch? Does that also fix it?

force_gtt.diff

@agd5f , yes, that patch seems to fix it on 6.2-rc8 without amdgpu.sg_display=0

6.2-rc8 with amdgpu.sg_display=0 and patched without that parameter both don't fix it for me. Maybe it could be a different issue?

6.2-rc8 with amdgpu.sg_display=0 works for me.

I tried both the patch, and amdgpu.sg_display=0. Neither seem to fix the occasional local flickering for me (as described in a previous comment). However i never get the full screen flickering other people describe here.

marked #2407 (closed) as a duplicate of this issue

marked this issue as related to #2407 (closed)