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

Openmoko Public Trac bugs at
Sat Feb 21 20:46:49 CET 2009

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

Comment(by xbaldauf):

 Replying to [comment:18 andy]:
 > Replying to [comment:16 xbaldauf]:
 > > Interestingly, however, it looks like that, by using
 glamo_mci.sd_max_clk=1000000, I can raise the probability of getting such
 a crash like above to 100%. The crash happens always at GSM-login-time.
 > To be clear, at the time of this "crash", you have the permanent noisy
 screen business?

 Sometimes, sometimes not. Sometimes the noisy screen is busy (e.g.
 updated), sometimes even normal redraws happen (so the noisy screen is
 overwritten with the correct content), and sometimes everything stops,
 including screen updates.

 The triggering of the bug seems to be strongly GSM-related. AFAIK, it only
 happened when I login into the GSM network, place a phonecall or receive a
 phonecall or short message. Thus, when I have no GSM traffic for some
 hours or even days, the system seems to remain stable.

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