#9100 NORM 10.1.2: 2.6.27+ early boot crashes on XO1

Zarro Boogs per Child bugtracker at laptop.org
Sun Jul 25 00:59:01 EDT 2010


#9100: 2.6.27+ early boot crashes on XO1
--------------------------------+-------------------------------------------
           Reporter:  dsd       |       Owner:  dsaxena                          
               Type:  defect    |      Status:  new                              
           Priority:  normal    |   Milestone:  10.1.2                           
          Component:  kernel    |     Version:  Development build as of this date
         Resolution:            |    Keywords:                                   
        Next_action:  diagnose  |    Verified:  0                                
Deployment_affected:            |   Blockedby:                                   
           Blocking:            |  
--------------------------------+-------------------------------------------

Comment(by wmb at firmworks.com):

 I like dsaxena's idea of using early_printk().  You can put calls to that
 in start_kernel() to see how far through that it is getting.

 If early_printk() doesn't work early enough, you can do a poor-man's
 serial character output routine with:
 {{{
    while ((inb(0x3fd) & 0x20) == 0)
        ;
    outb('A', 0x3f8);
    while ((inb(0x3fd & 0x40) == 0)
        ;
 }}}

 Replace 'A' with different characters, or make a function.

-- 
Ticket URL: <http://dev.laptop.org/ticket/9100#comment:27>
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