Re: intel videocard performance degraded severely after 9.4 update

[Riccardo Mottola <riccardo.mottola%libero.it@localhost>]

Hi,

trying and testing...

I can get even more scarier errors from i915. I tried various
combination of enabling wifi before/after

As you can see, the buffer underrun appears after some moments, after I
completed login.

So we have
1) CPU Pipe A FIFO underrun
2) CPU Pipe B FIFO underrun
3) failed to load DMA map for stolen object: -22
4) failed to load DMA map for stolen object: -22 again
5) after a while CPU Pipe A FIFO underrun again

are there other old i915 owners?

[     5.327841] kern info: [drm] Memory usable by graphics device = 128M
[     5.337843] kern info: [drm] Supports vblank timestamp caching Rev 2
(21.10.2013).
[     5.337843] kern info: [drm] Driver supports precise vblank
timestamp query.
[     5.337843] i915drmkms0: interrupting at irq 11 (i915drmkms0)
[     5.367842] kern error:
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_fifo_underrun.c:363)intel_cpu_fifo_underrun_irq_handler]
*ERROR* CPU pipe A FIFO underrun
[     5.367842] kern error:
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_fifo_underrun.c:363)intel_cpu_fifo_underrun_irq_handler]
*ERROR* CPU pipe B FIFO underrun
[     5.377843] kern error:
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/i915_gem_stolen.c:555)i915_pages_create_for_stolen]
*ERROR* failed to load DMA map for stolen object: -22
[     5.377843] kern info: [drm] initialized overlay support
[     5.427842] kern error:
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/i915_gem_stolen.c:555)i915_pages_create_for_stolen]
*ERROR* failed to load DMA map for stolen object: -22
[     5.437847] intelfb0 at i915drmkms0
[     5.437847] intelfb0: framebuffer at 0xdc295000, size 1024x768,
depth 32, stride 4096
[     6.067853] wsdisplay0 at intelfb0 kbdmux 1: console (default, vt100
emulation), using wskbd0
[     6.078116] wsmux1: connecting to wsdisplay0
[    10.377920] wsdisplay0: screen 1 added (default, vt100 emulation)
[    10.387923] wsdisplay0: screen 2 added (default, vt100 emulation)
[    10.387923] wsdisplay0: screen 3 added (default, vt100 emulation)
[    10.387923] wsdisplay0: screen 4 added (default, vt100 emulation)
[    15.507997] kern error:
[drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/intel_fifo_underrun.c:363)intel_cpu_fifo_underrun_irq_handler]
*ERROR* CPU pipe A FIFO underrun