XMir test results for Xubuntu 13.10

sktsee sktseer at gmail.com
Wed Aug 21 18:37:02 UTC 2013


Just completed testing XMir/Mir on two machines with 32-bit ISO image 

Both test used default graphics drivers. No proprietary binaries used.

Machine One:
Old HP Pavillion with Intel 1.5 GHz Pentium4 and 768MB memory. Graphics 
card is GeForce FX 5200 with 128MB vid memory. 

Intial bootup with DVD presented blank screen with blinking cursor in 
upper left of screen for about 20secs, then Plymouth screen took over for 
about a minute or two (expected with old machine with less than 1GB of 
mem). Screen then blanked for several seconds until desktop appeared with 
a xfce4-terminal present. Text error message in terminal read :

Mesa 9.1.6 implementation error: Incomplete OpenGL ES 2.0 support.
Please report at bugs.freedesktop.org
unity-system-compositor: ../../../../../src/mesa/main/context.c:1551: 
_mesa_make_current: Assertion `newCtx->Version > 0' failed.
Aborted (core dumped)

Test successful since failover to Xorg completed without problems.

Machine Two:
Less older Dell Inspiron 570 with dual core AMD Athlon II X2 245 
Processor and 4GB memory. Graphics is on-board ATI Radeon HD 4200 w/ 
256MB mem. Bootup with DVD went to Plymouth screen after a few seconds 
and brought up desktop shortly thereafter. Confirmed that unity-system-
compsitor programs were loaded with pgrep command. 

Mouse movement was sluggish, though still usuable. Tweaking mouse 
acceleration didn't really help as it then became too easy to "overshoot" 
click target. Windows appeared/minimized/maximized very snappily. GUI 
function response inside of application (selecting menu options, buttons 
pushed, checkbox selection, dropdown lists, etc.) was also snappy. Even 
though moving windows around screen was slow because of the sluggish 
mouse, the movement produced no perceptible tearing.

Text input in Abiword, Mousepad, Gnumeric, Firefox with a webform display 
showed no sign of sluggishness or delay between keystroke and display on 
screen. Text selection in those apps for cut-n-paste was fast and had no 

No perceptible lag, screen artifacts, or discoloration when playing video 
in Parole, either in window or full screen mode. Transition between modes 
was also seamless. 

Graphics programs like Gimp and gthumb had no issues with displaying or 
editing images save for a mouse pointer issue described below.

In applications that change the mouse pointer from an arrow to, say, a 
zoom magnifying glass (like Firefox does when viewing a large image), the 
pointer has a small box surrounding it and inside the pointer looks like 
it has mouse trails turned on. Same thing happens in Gnumeric when it 
changes the pointer to a "+".

Overall, because the slow mouse movement is a significant performance 
regression, the test must result in a failed status. Mir is almost there, 
but not quite.


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