A Tale of three machines.

[poma]

On 07.04.2014 12:27, Chuck Forsberg WA7KGX wrote:
> I have now tried Rawhide 3.15 on three machines.

The Three Little Pigs(PCs), and A Big Bad Wolf(Debug Kernel)? :)

> A Core Duo E8500 (which only reports one core) runs fine.
> 
> An I5-3550 is somewhat unstable.  Interestingly, it fails Test 7
> on Memtest86+ 5.01 in SMP mode.  Others have reported
> the same problem with various machines.  The memory test
> passes without SMP mode.
> 
> An I7-3770K runs in 3.15 text mode but immediately freezes when
> X is started.  Anaconda 21.31-1 works but in rather low resolution.
> I tried it without the Nvidia card, using the on chip Intel gaphics
> and got the same freeze.

With a debug kernels, if you don't test the video modules per se,

/etc/X11/xorg.conf
Section "Device"
	Identifier	"video0"
	Driver		"modesetting"
EndSection

is a must-have.
Check for yourself a "Stats for nerds"/dropped frames with 1280/1920 on
YouTube. Within the Xfce of course. :)

Point is the '[xorg-x11-drv-]modesetting' ain't "accelerated", and this
is what pulls down the "real" modules as 'nouveau' & Co., within a debug
kernels.

> This machine runs Win7 and Heisenbug without crashing.
> This machine ran Memtest86+ 5.01 in SMP mode without issues.
> I will leave Memtest running for a while to make sure it is stable.

Regarding the Memtest86+, literally every test should pass, there is no
middle ground. Use a compatible RAM sticks.


poma