Re: chromium flickering rectangle corruption (with workaround)

[Paul Goyette <paul%whooppee.com@localhost>]

On Thu, 1 Jan 2026, David Brownlee wrote:

> > I use the radeon kms driver, and chromium for me works with the
> > fallback swiftshader software render.
> > I don't know if this issue depends on the drivers or all affected,
> > this is why I just added this workaround
> > to the README.
>
> Could I ask if you had to set anything explicitly in chromium or xorg
> settings, or did everything work "Out Of The Box"?
>
> I'm using the modesetting driver on a T14Gen1 under recent NetBSD-11_BETA
> i915drmkms0 at pci0 dev 2 function 0: Intel UHD Graphics (rev. 0x02)
>
> Would anyone else seeing the issue like to comment on their setup?

I'm on a nouveau:

nouveau0: NVIDIA GK208B (b06070b1)
nouveau0: bios: version 80.28.b8.00.13
nouveau0: interrupting at msi12 vec 0 (nouveau0)
nouveau0: fb: 2048 MiB GDDR5
...
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
nouveaufb0 at nouveau0
[drm] Initialized nouveau 1.3.1 20120801 for nouveau0 on minor 0
nouveaufb0: framebuffer at 0xf8100c0000, size 2560x1440, depth 32, stride 10240
wsdisplay0 at nouveaufb0 kbdmux 1: console (default, vt100 emulation), using wskbd0


+---------------------+--------------------------+----------------------+
| Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)           | 1B11 1849 721C 56C8 F63A | paul%whooppee.com@localhost    |
| Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | pgoyette%netbsd.org@localhost  |
| & Network Engineer  |                          | pgoyette99%gmail.com@localhost |
+---------------------+--------------------------+----------------------+