** Description changed: + SRU Justification: + + Impact: users are unable to specify all possible memory combining modes for vesafb, leading to poor performance + Fix: minor change allowing a greater range of values for the mtrr parameter, from the maintainer of the driver, specific to ubuntu sauce patches + Testcase: use of the module parameter vesafb.mtrr=3 etc works and shows up in /proc/mtrr with the correct permissions + + === + The UBUNTU SAUCE patches that add module support to vesafb make the "mtrr" module parameter "bool". This only allows the values 0 and 1, thus no MTRR entries or "uncachable" MTRR entries. To enable write- combining (or write-back) MTRR entries, the "mtrr" module parameter should be "uint" (or "int"). I'll attach two patches, the first makes the described modification, the second one additionally makes write-combining MTRR entries the default. (Just as it already is for e.g. uvesafb.) Kind regards, - Thomas + Thomas
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/778043 Title: vesafb: mtrr module parameter is uint, not bool -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
