[Bug 95736] [IVB bisected] *ERROR* uncleared fifo underrun on pipe A

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95736

Matt Roper <matthew.d.roper at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
           Assignee|intel-gfx-bugs at lists.freede |matthew.d.roper at intel.com
                   |sktop.org                   |
                 CC|                            |matthew.d.roper at intel.com

--- Comment #2 from Matt Roper <matthew.d.roper at intel.com> ---
Do these messages only appear one time when the driver first loads, or do they
continue to get generated during regular system operation (e.g., moving mouse,
changing modes, etc.)?

If you only see them when the driver is loaded, then there's probably something
not quite right during our initial watermark sanitization step where we inherit
the BIOS configuration and try to clean it up.  If they continue to get
generated later while the system is in use, that will indicate that we're still
doing something wrong at runtime, which is more serious.

Is there any corruption/flickering that goes along with these messages?

If you could provide a dmesg log of a boot with debugging turned on
(drm.debug=0xf), that might help us debug where the problem is.

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