<br><div class="gmail_quote">On Thu, Aug 30, 2012 at 9:50 PM, Mikus Grinbergs <span dir="ltr"><<a href="mailto:mikus@bga.com" target="_blank">mikus@bga.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>On 08/30/2012 11:53 AM, Samuel Greenfeld wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
what version of Open Firmware are you using that you are<br>
replying to the Q3C09 thread?<br>
</blockquote>
<br></div>
q3c09<br>
<br>
The reason I posted to this thread is -- I did NOT have the described kernel panic when booting os21 on the XO-1.5 with q3c08</blockquote><div> </div><div>I apologize for asking; but in some cases people post to the wrong thread.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
What make and model of USB Ethernet adapter are you using?<br>
</blockquote>
<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
SMC2208<br>
<br>
Do you think this matters? I have been using these USB ethernet adapters for four years now, and have never had any problems using them (on XO-1 and XO-1.5) with any build. [In the past I sometimes have had firmware failures (particularly with q2b firmware - which sometimes would "hang" in the firmware when I was trying to boot (unless the USB ethernet adapter was unplugged from the XO before the XO was booted).]<br>
<div></div></blockquote><div><br>Open Firmware knows how to use certain types of USB Ethernet adapters in addition to the internal Wifi adapter, and supports accessing files via many network protocols in addition to local means. You can tell OFW to "fs-update http:\\<a href="http://download.laptop.org" target="_blank">download.laptop.org</a>\xo-1.5\os\candidate\12.1.0-21\21021o1.zd" (with the slashes intentionally backwards) and it would try to get on a network and install the build that way.<br>
<br>We also have been tweaking USB timings related to probing; I have 4 GB
USB sticks that Q3C07 has to probe twice in OFW but Q3C08 handles the
first time.<br><br>Newer USB adapters also often simulate USB "sticks" or "CD-ROMs" with driver software. In this situation that does not appear to be the case.<br>
<br><br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Does your network provide network-based boot services ?<br>
</blockquote>
<br>
No. When I am using an ethernet-based LAN, that network provides __NO__ services - not even DHCP.<br>
<br>
But I think this question is irrelevant - the described panic occurred while trying to load kernel software -- long before the build would get around to attempting any initialization of network services.<span><font color="#888888"><br>
</font></span></blockquote><div><br>Linux needs to be told what the root device is. OLPC OS builds rely on Open Firmware to tell it where the kernel was loaded from so it knows if it should mount partitions from the internal or external SD card, etc.<br>
<br>Although I have never tried it, OFW can fully network boot; which is why I needed more information to figure out if it was trying to do so.<br></div></div><br><br>In any case I have upgraded a XO-1.5 to Q3C09 and I did not encounter this issue with my USB adapter. I was concerned about Q3C07 because we were hoping to release the final version of 12.1.0 in the immediate future and it includes Q3C07.<br>
<br>This does not mean you do not have a problem that needs to be fixed. Given Open Firmware probes all USB ports, and can use certain types of USB Ethernet adapters in addition to the internal Wifi card, a bad attempt at checking a USB Ethernet adapter could mess up futher booting.<br>
<br>---<br>SJG<br>