[Bug 48932] Re: i915_wait_irq error: system hangs while running heavy graphics applications

[Hannes Hauswedell]

I can confirm this bug.
I have two up-to-date dapper laptops, a Dell Inspiron 640m and a Dell Inspiron 1300. My experiences:
When i start a full-screen OpenGl application , like Quake3 the screen first remains black, but pressing Ctrl+Esc redraws the screen, showing the menu. everything works fine then.
When i start Warcraft3 in Wine, i sometimes have the same situation (menu is black, but if i manage to start a game via keyboard-shortcuts everything works ok). most of the times though, the screen becomes black, the sound plays, then stops, i cannot use keyboard shortcuts , the application, the x-server and everathing with it hangs. i somtimes see the mouse in a little area in the center of the screen. the rest stays black, but redraws once in while (the resolution seems to change). i have no way of getting out of this, neither Ctrl+Alt+Backspace nor Ctrl+Alt+F* work.
BUT i am able to login in via ssh and to perform normal actions like reboot. (note that killing or attempting to restart X does not work)
via ssh i found out that one message is logged:

[17183271.528000] [drm:i915_wait_irq] *ERROR* i915_wait_irq: EBUSY --
rec: 736021 emitted: 736024

so i am pretty sure its the same issue.

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i915_wait_irq error: system hangs while running heavy graphics applications
https://launchpad.net/bugs/48932