I think I can eliminate the possibility that the texture binding is failing. Using direct bypass rendering (egltriangle -f) still has the same bug. So it's not a server-side GL compositing issue.
Seems like a fundamental failure in the GBM/GEM/PRIME/DMAbuf stuff. Something the i915 driver doesn't do right... I noticed some comments in Wayland along the same lines, where Wayland too has a black buffer problem on i915: http://lists.freedesktop.org/archives/wayland-devel/2013-October/011593.html So on the plus side, the old PentiumD can run mir_demo_server_shell at 1920x1200 with super-smooth 60 FPS. On the down side, only software clients are usable :( ** Also affects: mesa (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Summary changed: - i945: GL clients are rendered as black or transparent windows when using i945 graphics + i945: Mir GL clients are rendered as black or transparent windows when using i945 graphics ** Description changed: Running Mir on a Pentium D system with integrated i945 graphics, appears to work at first. The server starts and software clients are rendered - correctly. However hardware (GL) clients never appear on screen, despite - logging to stdout that they think they are rendering: + correctly. However hardware (GL) clients are rendered as all black or + transparent windows, despite logging to stdout that they think they are + rendering: - $ sudo bin/mir_demo_client_egltriangle + $ sudo bin/mir_demo_client_egltriangle Current active output is 1920x1200 +0+0 Server supports 2 of 6 surface pixel formats. Using format: 4 libEGL warning: unsupported platform (null) 1 FPS 33 FPS 60 FPS 60 FPS 60 FPS 60 FPS - - The GL demo clients are seemingly never composited at all. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1275398 Title: i945: Mir GL clients are rendered as black or transparent windows when using i945 graphics Status in Mir: Triaged Status in “linux” package in Ubuntu: Incomplete Status in “mesa” package in Ubuntu: New Bug description: Running Mir on a Pentium D system with integrated i945 graphics, appears to work at first. The server starts and software clients are rendered correctly. However hardware (GL) clients are rendered as all black or transparent windows, despite logging to stdout that they think they are rendering: $ sudo bin/mir_demo_client_egltriangle Current active output is 1920x1200 +0+0 Server supports 2 of 6 surface pixel formats. Using format: 4 libEGL warning: unsupported platform (null) 1 FPS 33 FPS 60 FPS 60 FPS 60 FPS 60 FPS To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1275398/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
