Apparently the GBM bypass logic was quite safe for a couple of years. The offending regression only happened fairly recently in:
------------------------------------------------------------ revno: 2337 [merge] author: Kevin DuBois <[email protected]> committer: Tarmac branch nick: development-branch timestamp: Mon 2015-02-23 14:50:14 +0000 message: graphics: move the post() command from the DisplayBuffers to the new DisplayGr oup interface. This allows platforms to designate which DisplayBuffers must be p osted in a common function. Approved by PS Jenkins bot, Alberto Aguirre, Andreas Pokorny, Alan Griffiths, Alexandros Frantzis. ------------------------------------------------------------ ** Summary changed: - [regression] Xmir -sw (software) mode crashes the Mir server + [regression] Fullscreen software surfaces (like Xmir -sw) can crash the Mir server -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1493721 Title: [regression] Fullscreen software surfaces (like Xmir -sw) can crash the Mir server To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1493721/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

