Bug ID | 91534 |
---|---|
Summary | r300 blocking GLX and EGL compositing in KWin (KDE Plasma 5.x)? |
Product | Mesa |
Version | 10.5 |
Hardware | x86-64 (AMD64) |
OS | Linux (All) |
Status | NEW |
Severity | normal |
Priority | medium |
Component | Drivers/Gallium/r300 |
Assignee | dri-devel@lists.freedesktop.org |
Reporter | aaron.d.pickett@gmail.com |
QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 117488 [details] Attempt to force EGL-based OpenGL compositing I have an old laptop with ATI RS480 graphics (Radeon Xpress 200M), and I've been testing KDE Plasma 5.x in KUbuntu 15.04 (currently version 5.3 from the backports PPA). In all the versions I've tried, OpenGL compositing fails. For the GLX API, I assume this is because r300 *almost* supports OpenGL 2.1, but falls short on NPOT texture support. After some reading (http://blog.martin-graesslin.com/blog/2011/07/running-kwin-with-opengl-es-2-0/), I thought I might try the EGL API for OpenGL ES compositing. The GUI wouldn't let me select EGL, so I forced it using environment variables (https://community.kde.org/KWin/Environment_Variables) as follows: KWIN_OPENGL_INTERFACE=egl KWIN_COMPOSE=O1 (I also tried O2, same result) Unfortunately, the (truncated) result is: kwin_core: OpenGL driver recommends XRender based compositing. Falling back to XRender. ... kwin_core: Failed to initialize compositing, compositing disabled >From what I've read, the r300 should have full OpenGL ES 2.0 support, so is the driver blocking EGL compositing unnecessarily? The full log of my attempt to force EGL-based compositing is attached.
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