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This page contains information about modifications to the XO hardware. These either fix a problem/shortcoming with particular implement =Modification to XO-1 Production Models=

= XO-4 model C2 has a power regression from the previous C1 and B1 models = ...of several runs of 5 B1 machines 5 C1 machines and 9 C2 machines. The C2 models show to have both an average and peak power draw that is greater than B1 an

...op per Child has released OLPC OS [[18.04.0]] for the [[NL3]] and [[ED20]] models. == Installing older Ubuntu on OLPC XO-1, XO-1.5, XO-1.75 or XO-4 ==

...raphics! This page is for those of us working to bring 3D graphics to the XO. == Current state of 3D on XO ==

...O_1.75_C1|C1]],[[XO_1.75_C2|C2]]) and all [[XO-4_Touch|XO-4 Touch]] laptop models. ...during the [[XO1.75_Bringup|initial bringup of XO-1.75]] and [[XO4_Bringup|XO-4 motherboards]], before we had a working firmware to preload onto the OFW

...1.5]], and XO-1.5 High School Edition. It was previously known as "F14 for XO" before being formalised into this release. ...nload URL::http://download.laptop.org/xo-1.5/os/official/874/]] for XO-1.5 models

Works on XO-4 B1 and later only. Do not use on XO-4 A or other models. * [http://tracker.coreboot.org/trac/openfirmware/changeset/3527 3527] OLPC XO-4 - added reset-gpios property in WLAN SDHCI node.

Works on XO-4 B1 and later only. Do not use on XO-4 A or other models. * [http://tracker.coreboot.org/trac/openfirmware/changeset/3529 3529] OLPC XO-4 - Corrected polarity of reset-gpios property in WLAN SDHCI node.

Works on XO-4 B1 and C1 only. Do not use on XO-4 A or other models. * touchscreen, support for non-touchscreen models, fixes <trac>12391</trac>,

...er-button.jpg|thumb|right|Power & Game buttons for XO-1 B2 and older XOs. XO-1 B3 and newer have "O" at the top and "✓" (check) at the right.]] ...the same time as powering on the [[Hardware_specification#Laptop_Hardware|XO laptop]].

Works on XO-4 B1 and C1 only. Do not use on XO-4 A or other models. * XO-4 C1 touchscreen detection, improve reliability by enabling a pull-down dur

...eachers and other students who are interested in leading students with the XO as a constructivist learning tool. ...how to help students share their new knowledge to act on their new mental models

...ems with the USB interfaces of an [[Hardware_specification#Laptop_Hardware|XO laptop]]. ...nectors to the CS5336 Southbridge (XO-1)/VX855 Companion (XO-1.5)/USB Hub (XO-1.75). If there is a [[XO_Troubleshooting_USB#Motherboard_signal_integrity

...fixed a problem with the wireless driver on the XO-1, XO-1.5, XO-1.75 and XO-4 laptops. On XO-4 (8787), the problem does not occur.

Works on XO-4 B1 only. Do not use on XO-4 A or other models. * [http://tracker.coreboot.org/trac/openfirmware/changeset/3422 3422] OLPC XO-1.75 - remove BSL support, was used for prototyping

* 0: XO-1 * 1: XO-1.5

Works on XO-4 B1 only. Do not use on XO-4 A or other models. * [http://tracker.coreboot.org/trac/openfirmware/changeset/3385 3385] OLPC XO-4 - suppress test in SMT, requested by Chia-Hsiu.

...atforms are XO-1.75 and XO-4. Community builds may be available for older models. === XO-4 ===

Works on XO-1.75 B1 and C1 only. Do not use on A2 or A3. ...eset/2985 2985] OLPC - remove USB serial adapter keyboard support from all models, <trac>11871</trac> <trac>11887</trac>

Works on XO-4 B1 and later only. Do not use on XO-4 A or other models. ...//tracker.coreboot.org/trac/openfirmware/changeset/3525 3525] OLPC XO-1.75 XO-4 - review, default wireless configuration manufacturing tags, NN for netwo