XO B2: Difference between revisions
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== Software Support == |
== Software Support == |
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* B2-1 laptops have insufficient RAM for builds after 406. (The automatic firmware upgrade will |
* B2-1 laptops have insufficient RAM for builds after 406. (The automatic firmware upgrade will |
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cause problems on later builds!) |
cause problems on later builds!) |
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| ⚫ | |||
== Restrictions == |
== Restrictions == |
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* There may be occasional crashes (possibly made worse by suspend/resume) when the battery is running low. Above 25% of capacity, or plugged into a power adapter, you should be OK ([http://dev.laptop.org/ticket/1835 Trac #1835]) |
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* electrical system defects, while running Q2D05 firmware, see #1835, #1752, #4476, #4479, #895, #947, |
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* There may be times when the WLAN (USB) hangs (possibly made worse by suspend/resume) ([http://dev.laptop.org/ticket/1752 Trac #1752], [http://dev.laptop.org/ticket/4476 #4476]) |
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** no wake on keyboard or touchpad (#895), |
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* Power cycling the DCON is liable to crash the laptop. This power cycling will occasionally happen in response to a DCON bug triggered by suspend/resume ([http://dev.laptop.org/ticket/4479]); |
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| ⚫ | |||
* Rare crashes may be caused by other sources during suspend/resume (Camera, SD card, clock settling time), some units (especially B3s) may be more sensitive than others ([http://dev.laptop.org/ticket/1835 #1835]) |
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| ⚫ | |||
* The keyboard/touchpad may not be used to wakeup from a suspend/resume ([http://dev.laptop.org/ticket/895 #895]) |
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*[[No_serial_number|no serial number]] |
*[[No_serial_number|no serial number]] |
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Revision as of 05:24, 6 January 2009
This page is monitored by the OLPC team.
XO Laptop Beta test model BTest-2, also known as B2.
Approximately 2500 systems were built by Quanta and distributed. These are fully functional machines with CaFE ASICs, and reflect some, but not all of the learning and improvements from testing of BTest-1. Much more information about the BTest-2 systems can be found in the BTest-2 Release Notes.
Identification
BTest-2 laptops are almost identical visually with BTest-1 laptops. An easy way to tell the difference between BTest-1 and BTest-2 is that BTest-1 keyboards have white lettering, and BTest-2 has black lettering.
There are two flavors of B2:
- Beta Test 2-1 (B2-1) systems, which only have 128 MB of memory, have a label under the battery that says B2-TEST-SAMPLE and a label that says B2-#, where # is one to 16.
- Beta Test 2-2 (B2-2) systems, which have 256MB of memory, have a label under the battery that says B2-7-ext.
Software Support
- firmware tested up to Q2C27 only, do not upgrade beyond this version of firmware unless specific support for model is mentioned, per olpc-devel mail 2007-September/006767.
- B2-1 laptops have insufficient RAM for builds after 406. (The automatic firmware upgrade will
cause problems on later builds!)
Restrictions
- There may be occasional crashes (possibly made worse by suspend/resume) when the battery is running low. Above 25% of capacity, or plugged into a power adapter, you should be OK (Trac #1835)
- There may be times when the WLAN (USB) hangs (possibly made worse by suspend/resume) (Trac #1752, #4476)
- Power cycling the DCON is liable to crash the laptop. This power cycling will occasionally happen in response to a DCON bug triggered by suspend/resume ([1]);
- Rare crashes may be caused by other sources during suspend/resume (Camera, SD card, clock settling time), some units (especially B3s) may be more sensitive than others (#1835)
- The keyboard/touchpad may not be used to wakeup from a suspend/resume (#895)
- DCON will glitch on wake (#947),
- Video problems due to hardware design flaw, new camera activity will not work, older camera activity will.
- no serial number