(In reply to comment #85) > The intel_ring_setup_status_page() does a posting read anyway, so it is not > an ordering issue. So this is back in the magic read territory, can you try > with a msleep(10) instead of the read just to confirm that it is the read > doing the trick and not an extra delay?
With msleep() used instead of the register read, the problem triggers fully reliably again; i.e. the "magic read" really does some trick, although it's not a complete cure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1339939 Title: [Lenovo ThinkPad T400] intel graphics fail after suspend with 3.16 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1339939/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
