svgalib on gentoo trouble

dannyk1 · 01-10-2009, 01:31 AM

Hi all. I am trying to setup advancemame on my gentoo machine and am having trouble with svgalib.

When I emerge svgalib, it successfully installs svgalib-1.9.25 but when I try to run advmame from a console, it tells me svgalib is missing.

If I try

Quote:

lsmod |grep svga

it returns nothing.

I have been following instructions from Here but cant get (or find) the kernel module to load.

I have also tried older versions of svgalib and manually tried to compile them but they all fail with different errors.

The closest I can get is when I let emerge install it.

Any help getting svgalib working would be great.

i92guboj · 01-10-2009, 04:58 AM

Quote:

Originally Posted by dannyk1

Hi all. I am trying to setup advancemame on my gentoo machine and am having trouble with svgalib.

When I emerge svgalib, it successfully installs svgalib-1.9.25 but when I try to run advmame from a console, it tells me svgalib is missing.

If I try it returns nothing.

I have been following instructions from Here but cant get (or find) the kernel module to load.

I have also tried older versions of svgalib and manually tried to compile them but they all fail with different errors.

The closest I can get is when I let emerge install it.

Any help getting svgalib working would be great.

You can start checking if the module was compiled against the right kernel.

Code:

uname -r
find /lib/modules -name \*svga\*

dannyk1 · 01-10-2009, 05:24 AM

output of uname -r

Quote:

2.6.26-gentoo-r4

Output of find /lib/modules -name \*svga\*

Quote:

/lib/modules/2.6.26-gentoo-r4/misc/svgalib_helper.ko

If I do

Quote:

insmod /lib/modules/2.6.26-gentoo-r4/misc/svgalib_helper.ko

I get

Quote:

insmod: error inserting '/lib/modules/2.6.26-gentoo-r4/misc/svgalib_helper.ko': -1 Invalid module format

I also re-emerged svgalib and took note of the output.

Quote:

* Updating module dependencies for 2.6.26-gentoo-r4 ...
*
* /lib/modules/2.6.26-gentoo-r4/build/System.map not found.
* You must manually update the kernel module dependencies using depmod. [ !! ]
*
* Adding module to moduledb.
>>> Regenerating /etc/ld.so.cache...

>>> Recording media-libs/svgalib in "world" favorites file...

* Messages for package media-libs/svgalib-1.9.25:

*
* /lib/modules/2.6.26-gentoo-r4/build/System.map not found.
* You must manually update the kernel module dependencies using depmod.
*

after this I ran depmod but that didn't make a difference.

i92guboj · 01-10-2009, 06:05 AM

I never was a big fan of svgalib, for one reason or another it always cause trouble. The only thing I can think of is to clean the kernel source tree from object code file and rebuild from scratch. Maybe the problem is that the kernel and the module have been compiled with different gcc versions though I highly doubt it.

If you can't get it to work, you can still use advancemame with fbcon. Or you could even use it thru sdl, since sdl has support for directfb, which I highly prefer to the rest of alternatives.

dannyk1 · 01-10-2009, 10:49 PM

I have sdlmame installed which works fine on X, (so does advmame) but I eventually want to plug it into an arcade cabinet and run on a 15khz monitor. Thats why I have been persisting with svgalib.

The kernel and module have been built with the same version of gcc so I doubt that is the problem.

i92guboj · 01-11-2009, 03:49 AM

Quote:

Originally Posted by dannyk1

I have sdlmame installed which works fine on X, (so does advmame) but I eventually want to plug it into an arcade cabinet and run on a 15khz monitor. Thats why I have been persisting with svgalib.

My whole point is that sdl can work without X, on top of directfb. That way you wouldn't need svgalib, just a working framebuffer driver on your kernel.

dannyk1 · 01-12-2009, 12:16 AM

Ill have to give that a try.

At the moment my framebuffer driver doesn't work properly

Quote:

---------------------- DirectFB v0.9.25 ---------------------
(c) 2000-2002 convergence integrated media GmbH
(c) 2002-2004 convergence GmbH
-----------------------------------------------------------

(*) DirectFB/Core: Single Application Core. (2008-12-18 09:39)
(*) Direct/Memcpy: Using linux kernel memcpy()
(!) Direct/Util: opening '/dev/fb0' and '/dev/fb/0' failed
--> No such file or directory
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment
variable.
(!) DirectFB/Core: Could not initialize 'system' core!
--> Initialization error!
Could not initialize SDL: DirectFBCreate: Initialization error!

Not sure why, I built the kernel with "genkernel all".

Might have to have a crack at a manual build.

Thanks for the help.