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... -- Resume from suspend doesn't not work on the Mobile 4 Series chipsets https://bugs.launchpad.net/bugs/276943 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
