On Mon, 19 Sep 2016 16:53:22 +0200, Edward wrote in message 

> Hi,
> If DNG administrators consider this email not appropriate for the
> list, please delete it.
> A kernel error is requesting me to upgrade my HP Probook 4540s UEFI.

..me, I'd try another and pristine kernel, from https://www.kernel.org/
loooooong before messing with boot firmware etc from the SystemD gang,
as in "Cui Bono?" from bricking your laptop.

..good _old_ build recipe:
Note the age. ;o) 

> The error involves the i915 graphics driver. On another laptop, the
> one on which I coded simple-netaid, i915 failed to turn on the
> backlight for a whole year. However, at that time I found a workaround
> using a kernel parameter. I wish I find another kernel parameter that
> prevents the current error. Since DNG is read by many who may have
> used kernel parameters to override sloppy firmware implementations, I
> am posting here for some help.
> The kernel "complains" as follows:
> <<
> [    7.471266] [drm] Wrong MCH_SSKPD value: 0x16040307
> [    7.471269] [drm] This can cause pipe underruns and display issues.
> [    7.471270] [drm] Please upgrade your BIOS to fix this.
> [    7.489912] fbcon: inteldrmfb (fb0) is primary device
> [    7.598128] EFI Variables Facility v0.08 2004-May-17
> [    7.724203] hp_accel: laptop model unknown, using default axes
> configuration [    7.729494] jmb38x_ms 0000:02:00.3: enabling device
> (0000 -> 0002) [    7.757025] [drm:ilk_display_irq_handler] *ERROR*
> Pipe A FIFO underrun [    7.759849]
> [drm:cpt_set_fifo_underrun_reporting] *ERROR* uncleared pch fifo
> underrun on pch transcoder A [    7.759851]
> [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun
> >>
> Thanks.

..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.
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