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On 02/13/2012 12:38 PM, lkcl luke wrote:
<blockquote
cite="mid:CAPweEDx7vZ5Ziz-ns+8+D8qiVnP4udeFaT_5_x9arz0qGnoLzg@mail.gmail.com"
type="cite">
<pre wrap="">On Mon, Feb 13, 2012 at 2:06 AM, Tom Cubie <a class="moz-txt-link-rfc2396E" href="mailto:tangliang@allwinnertech.com"><tangliang@allwinnertech.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">On 02/13/2012 09:43 AM, lkcl luke wrote:
</pre>
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<pre wrap="">On Mon, Feb 13, 2012 at 1:18 AM, Tom Cubie<a class="moz-txt-link-rfc2396E" href="mailto:tangliang@allwinnertech.com"><tangliang@allwinnertech.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I can get the lcd console either. I have reported to the girl who
workson the display driver the problem. She is not interested and
will not look at it. She said it's no use in products :(
</pre>
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<pre wrap=""> what, screens are of no use??
</pre>
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<pre wrap="">
She means fb console,
</pre>
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<pre wrap="">
ahh ok. hm, that should be pretty straightforward.
</pre>
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<pre wrap="">showing the little penguin at boot time is
no use in products. The lcd driver is ok when playing some test
videos under linux cli, no display for the console.
</pre>
</blockquote>
<pre wrap="">
it's usually pretty straightforward to get that up-and-running, boot
params console=/dev/fb0 which obviously you can either set in the
kernel config or directly into the linux kernel source code as the
default _or_ set them in u-boot. but you *have* to have the lcd etc.
etc. "built-in" you cannot possibly hope to have that work if you've
got it as a module, because, duh, it won't be loaded when it's needed,
will it?? :)
btw if you've got a "working" system that you can actually boot up
and get any kind of login / command-prompt (ssh over ethernet, serial
console) then my favourite trick to see if things are working is just
"echo shfjsafhajsfhsajfsadlf > /dev/fb0" - if you see garbage in the
top left corner of the lcd, it's working.
get that working first _then_ try sorting out the boot parameters.
l.
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</blockquote>
<br>
Thank you for your clear explanation. I can get something on the lcd<br>
when i "cat /dev/urandom > /dev/fb0". But as long as i open the
kernel<br>
config <span class="Apple-style-span" style="color: rgb(102, 102,
102); font-family: Arial, Helvetica, sans-serif; font-size: 14px;
font-style: normal; font-variant: normal; font-weight: normal;
letter-spacing: normal; line-height: 21px; orphans: 2; text-align:
-webkit-auto; text-indent: 0px; text-transform: none; white-space:
normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust:
auto; -webkit-text-stroke-width: 0px; background-color: rgb(255,
255, 255); display: inline !important; float: none; "></span>"Framebuffer
Console support" the kernel can not boot up, and <br>
hang at "[LCD] lcd_module_init". There is some problem of the
display<br>
driver. And after complaining many times to her(her seat is next to
me),<br>
she agreed to look at it when she has time.<br>
<br>
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