[SPAM] Re: [9front] ThinkPad X250 screen blanks against my wishes

[qwx <qwx@sciops.net>]

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Content preview:  > If I leave the machine sitting idle for a while, the screen
   goes > black, but the backlight is still on, and I can see very faint colors
   > changing at the top of the screen. This sucks, because ther [...] 

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From: qwx <qwx@sciops.net>
To: 9front@9front.org
Subject: Re: [9front] ThinkPad X250 screen blanks against my wishes
Date: Thu, 10 Jan 2019 09:49:58 +0100
Message-ID: <5BDAB1A586F7214BF811C877C6236247@wopr.sciops.net>

> If I leave the machine sitting idle for a while, the screen goes
> black, but the backlight is still on, and I can see very faint colors
> changing at the top of the screen.  This sucks, because there seems to
> be no way to recover.  Every time a leave the office and return I have
> to reboot.

This seems to be an issue with newer intel graphics cards.

As a workaround, you can disable blanking:

; echo blanktime 0 >'#m'/mousectl

x250 is broadwell, you could also try adding its pci did to
/sys/src/cmd/aux/vga/igfx.c as a haswell ulx machine and try using
igfx with monitor=auto.

This will also disable blanking unless you also add the pci did to
the several checks in /sys/src/9/pc/vgaigfx.c.

x240 is haswell ulx and is reported to not work, so this might not
either.

Hope this helps,

qwx