Openmoko Bug #2217: Noise screen of death: Freerunner looses SDIO connection

[Openmoko Public Trac]

#2217: Noise screen of death: Freerunner looses SDIO connection
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 Reporter:  xbaldauf         |          Owner:  openmoko-kernel
     Type:  defect           |         Status:  new            
 Priority:  normal           |      Milestone:                 
Component:  System Software  |        Version:                 
 Severity:  major            |       Keywords:                 
 Haspatch:  0                |      Blockedby:                 
Estimated:                   |    Patchreview:                 
 Blocking:                   |   Reproducible:                 
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Comment(by andy):

 That randomish noise is not that easy to generate.  Plus, it comes from
 the top and ends in a linear way.

 I wonder if what has happened is that too much data is written from the SD
 Card unit in the Glamo (which is done by local Glamo DMA), so that it
 blows through the allocation of Glamo internal memory and wraps into an
 alias that is the framebuffer.

 Is the noise always appearing from the "top" when it comes?

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Ticket URL: <https://docs.openmoko.org/trac/ticket/2217#comment:28>
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