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XO laptop again -- with video - Alex Belits
abelits
abelits
XO laptop again -- with video
I made a video of my XO running Ubuntu. Nothing really unusual -- booting up, using wireless networking, running Firefox, watching Youtube video, running OpenOffice.org writer simultaneously with Firefox in 256M without swap, rotating the screen and switching backlight on and off:

Part 1


Part 2


As usual, all video capture, adding titles and format conversion was done on my Linux desktop. Camera is previously mentioned Sony DCR-TRV320, titles added in Kino video editor.

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Comments
j_b From: j_b Date: May 21st, 2008 05:28 pm (UTC) (Link)
I assume the screen rotation is handled with xrandr or similar?

Any success in getting the drop down into higher-resolution monochrome/grayscale mode, and having xrandr resize appropriately?
abelits From: abelits Date: May 22nd, 2008 01:40 am (UTC) (Link)
Yes, rotation script is invoked from xbindkeys and calls xrandr, cycling through modes.

I haven't done any work on messing with resolutions, so for now everything assumes "subixel-is-a-pixel" model, with fonts, icons, GTK and window manager themes, and forced "physical" screen resolution compensating for the weirdness in color mode. Switching between resolutions will be helpful for applications that use plain X11, image display and graphics with thin lines at an angle. Horizontal and vertical lines, arcs and thick lines cover enough subpixels of all colors to look acceptable, though thin lines and fonts suffer from unusual resolution even if they don't get color artifacts.

Edited at 2008-05-22 01:43 am (UTC)
j_b From: j_b Date: May 22nd, 2008 02:04 pm (UTC) (Link)
Hm. One thing that should present an interesting challenge is getting subpixel rendering working for fonts on the diagonal-striped screen. (Which would require - working with Pango for gnome? Something else [xt?] for basic X / xterm? something else for KDE?)

The monochrome 1200x800(?) mode should of course be easier.
abelits From: abelits Date: May 22nd, 2008 03:16 pm (UTC) (Link)
Hm. One thing that should present an interesting challenge is getting subpixel rendering working for fonts on the diagonal-striped screen. (Which would require - working with Pango for gnome?

Cairo. For now, grayscale antialiasing works reasonably well, but the edges will be cleaner with true subpixel antialiasing. To think of it, grayscale antialiasing is already pretty close to optimal for text in low-saturation colors because positions of subpixels are exactly what subpixel antialiasing would expect. High-saturation colors, especially anything without green, suffers because of large numbers of missing pixels -- to fix that saturation should drop to nearly zero on edges, so subpixels of "wrong" colors will be lit, completing the outline.

Something else [xt?] for basic X / xterm?

X fonts and therefore everything that uses Xt, has to use 1-bit bitmap fonts, and therefore is incapable of antialiasing without a massive layer reshuffling. The best solution for those applications that look poorly in this mode is simply to reduce resolution in half, thus bringing font size and line readability to the level of a small 600x450 screen, however not all applications are going to take that well -- for now, I have just switched Xaw applications that I use to larger or bold fonts, and they are more or less usable that way.

something else for KDE?)

Yes, Qt rendering is different (and different between versions). Grayscale antialiasing for now.

The monochrome 1200x800(?) mode should of course be easier.

1200x900.

Edited at 2008-05-22 03:33 pm (UTC)
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