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