Note that the new patch upstream fixes the 845G-specific part of this bug. The 845G also suffers from the same i8xx incoherency that the 855GM suffers from (LP bug 541511). There is a patch for that as well at https://bugs.freedesktop.org/show_bug.cgi?id=27187#c281, but this has not been commited yet and probably needs more testing.
Note that the new patch upstream fixes the 845G-specific part of this bug. The 845G also suffers from the same i8xx incoherency that the 855GM suffers from (LP bug 541511). There is a patch for that as well at https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 27187#c281, but this has not been commited yet and probably needs more testing.