https://bugs.freedesktop.org/show_bug.cgi?id=99418
Bug ID: 99418 Summary: DRI3 Stuttering while scrolling in Chromium/Chrome with VBLANK off Product: DRI Version: XOrg git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon Assignee: dri-devel@lists.freedesktop.org Reporter: lei.pero@gmail.com
Not sure where to report this issue, as title says, problem is not present with VBLANK enabled.
Vblank is disabled in both xorg configuration and .drirc profile (and clutter when using GNOME).
Expected behaviour (DRI2): When scrolling pages (with smooth scroll) in Chromium for example, it defaults at FPS=refresh rate (my case 85Hz), there is just tearline present, everything else is smooth and fine (as with vblank enabled, except tearline).
On DRI3 however, even on simple forums/text based pages, there is stuttering/choppy scrolling.
GPU is HD 6770, Xorg server version is 1.19.1, if you need more information/testing, would be happy to do it.