[Bug 509219] Re: bttv driver working only with acpi=off on ASUS M3N78-EM

[jonie]

** Description changed:

  Binary package hint: linux-source
  
  My TV card (Leadtek Winfast TV2000/XP) seems to work only with acpi=off
- passed to kernel. When ACPI is enbaled, the picture is just a slideshow,
+ passed to kernel. When ACPI is enabled, the picture is just a slideshow,
  trying acpi=noirq makes the slideshow just a little faster. This can be
  reproduced with any kernel from 2.6.29 to 2.6.32 from mainline ppa, I
  tried both Hardy LTS and Karmic, didn't try older kernels as they fail
  to boot. This is no X problem, the behavior can be reproduced even
  without X and with nvidia module unloaded just by capturing a bit of
  video. I tried also to recompile bttv driver with IRQF_SHARED or
  IRQF_DISABLED explicitly declared, it didn't change a thing. The rest of
  PCI hardware seems to work fine.
  
  When the picture is stuttering dmesg reports:
  
  [   78.044297] bttv0: timeout: drop=301 irq=1092/1092, risc=595e2b3c, bits: HSYNC OFLOW
  [   78.604537] bttv0: timeout: drop=312 irq=1132/1132, risc=56822b5c, bits: HSYNC OFLOW
  [ 1081.948327] bttv0: timeout: drop=323 irq=1192/1192, risc=69dad6bc, bits: HSYNC OFLOW
+ 
+ Edit: The card works normally after disabling C1E in BIOS. It seems to
+ be a duplicate of this bug:
+ 
+ http://bugzilla.kernel.org/show_bug.cgi?id=13911

-- 
bttv driver working only with acpi=off on ASUS M3N78-EM
https://bugs.launchpad.net/bugs/509219
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