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

Mir Gets Workaround For Visual Glitches, Corruption

Ubuntu

Published on 13 September 2013 04:22 AM EDT
Written by Michael Larabel in Ubuntu
26 Comments

While Mir's composite bypass support can dramatically improve the performance for Linux OpenGL games running on the Ubuntu display server, some Intel and AMD users have experienced on-screen corruption and other visual glitches when relying upon XMir since the bypass support was merged.

If you experienced problems like Launchpad Bug #1218735 where the cursor would be broken up into horizontal line artifacts and ghosting on Intel or Launchpad Bug #1218815 where there would be graphics glitches and screen corruption on Radeon with XMir, a workaround should now be in place. This is unrelated though to the Mir visual corruption when using Unity 8 on Mir without any XMir in the equation.

Revision 1063 of Mir was made on Thursday and it adds a new flag so that Mir buffers can attempt to figure out whether or not they are scanout-capable, i.e. could be rendered directly to the screen. While a buffer shouldn't need to know this, Mir is exposing that detail to clients in order to workaround the Radeon and Intel problems when using composite bypass support on XMir with regard to caching.

Beyond the Mir change, the xf86-video-intel driver package in Ubuntu was already modified so that it can make a better decision about cache usage based upon whether the buffer is to be scanned out to the screen. An xf86-video-ati change is also expected as part of this work.

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 Linux News
  1. At Least Two Ubuntu Phone Announcements Expected In June
  2. Russia's Baikal Chips End Up Going For A MIPS CPU
  3. Mesa Git OpenGL Tests With Intel Ivy Bridge Graphics
  4. Blender 2.75 Allows For AMD OpenCL Support
  5. GNOME's Mutter 3.17.2 Adds X11/Wayland Clipboard Interoperation
  6. Wayland 1.8 RC2 Arrives Along With New Weston Compositor Release
  7. LLVM 3.7 Is Planned For A Late August Release
  8. The OpenGL ES 3.1 Foundation Is Being Laid In Mesa
  9. There Are 140k Benchmark Results So Far On LinuxBenchmarking.com
  10. LLVM 3.6.1 Brings R600 & MIPS Fixes
Latest Articles & Reviews
  1. Opening The Gates To Our Daily Open-Source Linux Benchmark Results
  2. The Latest Features For Linux Performance Management + Benchmark Monitoring
  3. Noctua NH-U12DX i4 + NF-F12
  4. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
Most Viewed News This Week
  1. The Linux 4.0 EXT4 RAID Corruption Bug Has Been Uncovered
  2. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  3. Systemd 220 Has Finally Been Released
  4. Microsoft Open-Sources The Windows Communication Foundation
  5. Zapcc Claims To Be A "Much Faster C++ Compiler"
  6. LibreOffice 5.0 Beta 1 Released
  7. Another HTTPS Vulnerability Rattles The Internet
  8. OpenWRT 15.05 Preparing Improved Security & Better Networking