I would try:
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xrandr --newmode "1024x600_60.00" 48.96 1024 1064 1168 1312 600 601 604 622 -HSync +Vsync --output default --gamma 1:1:1 --mode 1024x600
I wouldn't because it breaks my logic of how things work.
This command attempts to use and create new mode at the same time.
I'd split it to 3 commands (first thought about 2, then read xrandr wiki example): 1st to create new mode, 2nd add this mode to list, 3rd to enable.
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xrandr --newmode "1024x600_60.00" 48.96 1024 1064 1168 1312 600 601 604 622 -HSync +Vsync
xrandr --addmode default 1024x600_60.00
xrandr --output default --gamma 1:1:1 --mode 1024x600_60.00
Note, i'm writing this not from linux and not from system where is installed VM, so syntax may be wrong since I can't check.
nARMstrong20 wrote:Output from LXTerminal. Currently using a Puppy variant, but I don't think it makes a difference, does it?
If you're trying to debug your Porteus, then output probably should be from Porteus too.
You could as well try video=SVIDEO-1:d boot option to disable s-video output if it is present on chip and Porteus accidentally tries to use it instead of output to screen (option found here https://wiki.archlinux.org/index.php/In ... modules.22
, explanation here https://bugs.freedesktop.org/show_bug.cgi?id=40013#c7
Yet another boot option i915.invert_brightness=1 from the fellow HP laptop strugglers (http://people.skolelinux.org/pere/blog/ ... video.html
In opposition to common sense, some guys succeed with disabling i915 modesetting (option i915.modeset=0) or disabling acpi (option acpi=off) (https://wiki.debian.org/KernelModesetting
, refer to Intel GfxCards/Known bugs section).
There are reports of fixing issue with i915.blacklist=1 option too (https://answers.launchpad.net/ubuntu/+s ... ion/217767
, see comments).
Another research based on http://people.skolelinux.org/pere/blog/ ... video.html
At the very end of article there is notion about fixing problem with option acpi_backlight=vendor.
If you will ever get resolution you want in the way of using acpi_backlight and will have brightness adjustement problems, then this could be a further reading https://bbs.archlinux.org/viewtopic.php?id=177616
Even if you won't, there's even more options in this thread (video.use_native_backlight=1 and acpi_osi=!Windows 2012).