Bug 199319
| Summary: | Flickering screen on AMDGPU and DC with Linux 4.16-2 | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | rainer |
| Component: | Video(DRI - non Intel) | Assignee: | drivers_video-dri |
| Status: | NEW --- | ||
| Severity: | normal | CC: | edt, eutychios23, haro41, harry.wentland, jokeyrhyme, lordheavym, marciosr10, mike, nicholas.kazlauskas, pmargeti34, zxvfxwing |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | Linux 4.16 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
|
Description
rainer
2018-04-08 09:10:11 UTC
Same here with RX470 @ 1920x1080 - HDMI Here too on arch with either mesa 17.3 or 18.0 on 4.16.1-rc with a RX480 4G HDMI (1920x1200) +1
Arch Linux 4.16 with amdgpu.dc=1
MSI Radeon Rx560 4GB -> LG 2560x1080 panel over HDMI
Flickering doesn't happen if Option "TearFree" "true" isn't set in driver's .conf file or if there is no tearing option ("vsync") selected in KDE system settings->display and monitor->compositor
Running 4.16 with amdgpu.dc=0 removes flickering.
I checked my X conf, no tearfree option is set, using 4.15 I set tearing prevention to never and rebooted into 4.16.1-rc. This does NOT stop the flickering here. Flicking does not occur with 4.15 dc-1 and does with 4.16. IMO this is a regression. Thanks for the hint with vsync, but it didn't change anything for me on Plasma-Wayland. At least I noticed, that the bright flickering on my screen on Plasma-Wayland when moving the mouse appears was due to night shift changing the colours. It worked well on Linux 4.15. But on Linux 4.16 I need to deactivate it so that the flickering on Plasma-Wayland during the mouse movements stops. With night shift and even vsync disabled, there is now just from time to time a flickering, irregularly. The flickering that is happening from time to time is probably the same as in the bug report https://bugzilla.kernel.org/show_bug.cgi?id=199101. So only the flickering when night shift is enabled on Plasma-Wayland seems to be different. Is this the same as bug 199101? The random flickering every 30 seconds is the same from my point of view. What is different on my setup is that Plasma-Wayland with night shift enabled with a changed color flickers with every mouse movement since Linux 4.16. So the answer is partially. I'm seeing this too, also plasma-wayland but with a PRIME Skylake/Tonga setup only Skylake is used on the desktop I should add this is 4.16-rc7 (agd5f's 4.18-wip branch) Qt 5.10, KDE frameworks 5.44, Plasma 5.12.4, Xorg 1.19.5 using the modesetting DDX (I'll try the Intel & AMDGPU DDXs tonight. Flickering here too: 4.16.0-2-ARCH, RX480, Mesa 18.0.0, x11 (X.Org 1.19.6). Same here: Flickering (as described by 'mail'): 4.16.1, R9 380X, Mesa 18.1.0-devel (git-d899826733), X11(1.19.6) Tried Gnome and XFCE, similar problems. This problem doesn't occur with: - older Kernel (4.15.0) - 3D Fullscreen (Games) - older GPU (R9 280X) Maybe a powerplay related problem, since it only affect newer AMD cards? ... have to add: This problem doesn't occur too with: - amdgpu.dc=0 linux 4.16.1, R9 380X, Mesa 18.1.0-devel (git-d899826733), X11(1.19.6) with: amdgpu.dc=0: no flickering, HDMI audio works amdgpu.dc=1: flickering, HDMI audio not working Same problem here, using linux 4.16.2 on Arch Linux and RX 480 DisplayPort, at 2560 x 1080. No xorg config set. Kernel parameter amdgpu.dc=1 The flickering happens eventualy, but when using nightlight gnome feature it happens more frequently. A fix should be in drm-next-4.17 of Alex's git repo at https://cgit.freedesktop.org/~agd5f/linux/?h=drm-next-4.17 and should make it into Linus's tree from there. That fix should also make it into 4.16 stable. (In reply to Harry Wentland from comment #16) > A fix should be in drm-next-4.17 of Alex's git repo at > https://cgit.freedesktop.org/~agd5f/linux/?h=drm-next-4.17 and should make > it into Linus's tree from there. > > That fix should also make it into 4.16 stable. Good to know! Thank you. @Harry Wentland, i am trying kernel 4.17.0-rc1 (patches already merged by linus): With 'amdgpu.dc=1', i get a black screen now at login (perhaps related to this dc issue). I found 2 new warnings and call traces in kernel log, like: Apr 18 18:28:41 debian kernel: WARNING: CPU: 10 PID: 345 at drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:132 generic_reg_update_ex+0x102/0x150 [amdgpu] ... @haro41, I recommend opening a new bug if you're seeing a different issue, unless you have strong reason to believe it's caused by the fixes for the flickering screen, or otherwise related to it. This issues (both, the flickering and the black screen) are obviously fixed with kernel 4.17.0-rc2. Thank you. Hello i also get screen flickering when running 3d games and massive performance drop on Xorg with amdgpu.dc enabled.If i add amdgpu.dc=0 to kernel parameters, Xorgs runs buttery smooth and games do not flicker,my gpu is polaris RX 550 4gb. Is there any disadvantage to run the gpu with amdgpu DC off? i use an analog vga monitor with an active vga to dvi-d converter and i do not plan to use hdmi in next few years ahead. Tested both kernels 4.19.x and 4.20rc6 |