1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking Benchmarking Platform
Phoromatic Test Orchestration

Qt 5.0 Is Going To Like LLVMpipe, Wayland

Free Software

Published on 08 May 2012 12:26 PM EDT
Written by Michael Larabel in Free Software
Comment On This Article

A Qt 5.0 discussion was held in Oakland on Monday.

Of the interesting mentions during the Qt 5.0 discussion was about Wayland and LLVMpipe. In terms of Wayland, it's already widely known that the Qt 5.0 tool-kit will have first-rate support for the Wayland Display Server. Nokia and Intel developers have been working on the Wayland-Qt5 support for months. During the Ubuntu Developer Summit session in Oakland, they basically reiterated that Wayland is being treated as one of their reference platforms. With being a reference platform for Qt, it will ensure good testing (it's these platforms that make up their continuous integration system) and that when new features are added to Qt, support will be a priority for these platform back-ends.

While talking about Wayland at UDS-Q, it's worth mentioning that on Wednesday there is going to be a "system compositor" session. For Ubuntu 12.10 they're looking at using a compositor to control video from boot to shutdown. The reported benefits they're trying to push are using smooth transitions from the splash screen to the greeter (what Plymouth claimed back in the day), VT switching is just problematic, one consistent monitor layout for all stages of the boot, a greeter as the lock screen, no ability to accidentally switch to locked sessions, and showing a greeter while the session is loading. This system compositor they want to use is obviously Wayland.

This Wayland work for Ubuntu 12.10 will basically come down to being a tech preview that they originally hoped for with Ubuntu 12.04 LTS. However, it's rather unlikely that Wayland will be in really usable form for Ubuntu 12.10, especially given Canonical's lack of upstream involvement on Wayland/Weston and the graphics driver dependencies. There will continue to be X11-fallback for the foreseeable future, but I still don't see Wayland support in Ubuntu going beyond an experimental state until at least Ubuntu 13.04. More details on the Ubuntu Wayland stuff tomorrow from the system compositor discussion.

Also talked about for Qt 5.0 and Wayland was the software rasterization method for this first major tool-kit upgrade in seven years. The Qt developers praised the CPU-based Gallium3D driver and will be relying upon LLVMpipe when no GPU hardware driver is available. They say that using LLVMpipe is working better than any software rasterizer of their own.

LLVMpipe remains too slow for OpenGL gaming even with the very latest $999 USD Intel CPUs, but it's good enough for a tool-kit and composited desktop. GNOME Shell runs fine on LLVMpipe even with only a modest CPU and no GPU driver support. Various other projects have also had their eye on LLVMpipe as a software fallback, like Firefox for software WebGL.

While this is all great news and just some of what's exciting about Qt 5.0, if you didn't hear, the final release is delayed to August.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  2. The Lenovo T450s Is Working Beautifully With Linux
  3. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  4. Linux 4.0 Hard Drive Comparison With Six File-Systems
  5. Lenovo ThinkPad T450s Broadwell Preview
  6. How Open-Source Allowed Valve To Implement VULKAN Much Faster On The Source 2 Engine
Latest Linux News
  1. EXT4 In Linux 4.1 Adds File-System Level Encryption
  2. Open-Source Ardour 4.0 Audio Software Has Big Improvements
  3. Linux-Powered Endless Computer Raises $100k+ In A Few Days
  4. GCC 5.1 RC2 Arrives, GCC 5.1 Planned For Next Week
  5. F2FS For Linux 4.1 Has New Features & Fixes
  6. Phoronix Server Upgrade This Weekend: Dual Haswell Xeons, 96GB DDR4
  7. Google's Experimental QUIC Transport Protocol Is Showing Promise
  8. Red Hat Joins Khronos, The Group Behind OpenGL & Vulkan
  9. NetworkManager Drops WiMAX Support
  10. Wine 1.7.41 Works More On Kernel Job Objects, MSI Patches
Most Viewed News This Week
  1. Nouveau: NVIDIA's New Hardware Is "VERY Open-Source Unfriendly"
  2. Linux 4.0 Kernel Released
  3. Microsoft Announces An LLVM-Based Compiler For .NET
  4. Linux 4.1 Brings Many Potentially Risky x86/ASM Changes
  5. Encryption Support For EXT4
  6. VirtualBox 5.0 Beta 2 Released
  7. Mozilla Start Drafting Plans To Deprecate Insecure HTTP
  8. KDBUS Is Taking A Lot Of Heat, Might Be Delayed From Mainline Linux Kernel