Ubuntu
xserver-xorg-video-intel package

  1. Bug #276943
  2. Comment #28

Comment 28 for bug 276943

Revision history for this message
Austin Chu (eefi) wrote : Re: Resume from suspend doesn't not work on the Mobile 4 Series chipsets

I think I may have localized where the bug is. If I add a sync() call in src/i830_dri.c:I830DRIInstIrqHandler() just before the call to drmCtlInstHandler(), the resume from suspend still fails. If I instead add a sync() call right after the call to drmCtlInstHandler(), the resume succeeds. This is a kludge fix; someone who knows more about this codebase should come up with the appropriate way to synchronize all CPUs here instead of this forcing synchronization indirectly by telling the kernel to flush all buffers to disk.

More information and a temp patch will come tonight if a better fix doesn't appear before then. I have a deadline in another project tonight that I should be working on instead right now...