[arch-general] New nvidia driver - video mode not recognized - remove vga= from kernel line?

David C. Rankin drankinatty at suddenlinkmail.com
Thu Oct 28 19:03:09 EDT 2010

On 10/28/2010 04:38 AM, Dan Vrátil wrote:
> Hello David,
> this cannot be related to nvidia drivers because of two things: 1) the
> drivers are loaded after the kernel boots and 2) the proprietary nvidia
> drivers do not support KMS (and according to nvidia they are not going
> too in near future).
> Make sure, you have nouveau blacklisted
> (/etc/modprobe.d/nouveau_blacklist.conf) because you don't need it when
> you use the proprietary drivers and last time I tested it, it had
> problems with the vga boot option.
> Dan

Thank you Heika, Attila, Dan,

	The mystery still remains. I didn't do it, but noveau was already blacklisted
on my box:

[17:32 archangel:/etc/modprobe.d] # l
total 32
drwxr-xr-x  2 root root  4096 Oct 19 19:34 .
drwxr-xr-x 96 root root 12288 Oct 28 00:49 ..
-rw-r--r--  1 root root   704 Jun 28 08:45 framebuffer_blacklist.conf
-rw-r--r--  1 root root    55 Jun  7  2009 modprobe.conf
-rw-r--r--  1 root root    18 Oct 18 09:28 nouveau_blacklist.conf
-rw-r--r--  1 root root   196 Sep 18 17:58 usb-load-ehci-first.conf
[17:32 archangel:/etc/modprobe.d] # cat nouveau_blacklist.conf
blacklist nouveau

	Also, on the (press enter or scan issue), I'm sure you are 100% correct Heiko,
but no matter whether I press enter or issue scan with this 8800GT, the list of
modes returned is the same. Also, both enter or scan take the same amount of
time to complete -- at least on this box.

	If the proprietary driver doesn't support KMS and isn't going to for a while,
then I wonder what changed to make my normal kernel line (that I've used for
years) suddenly start causing the invalid mode error? The kernel line is:

kernel /vmlinuz26 root=/dev/mapper/nvidia_baaccajap5 ro vga=0x31a

	As a test, I booted LTS with the vga=0x31a and it booted fine and into the
correct framebuffer. So this is looking more and more kernel related.

	I have also booted Arch without vga= in the kernel line and I do NOT get the
invalid mode prompt, but then I'm left with a 640x480 framebuffer. That looks
terrible on a 23" display.

	Oddly, when I boot with vga= and get the error, somehow after the timeout, I
get the right framebuffer.

	I'm stumped. Any idea on "what could have changed?" that could be causing the
mode error?

David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339

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