On Mar 10, 2018, at 06:10 PM, William Harrington <[email protected]> wrote:
On Sat, 10 Mar 2018 14:34:31 -0600
Bruce Dubbs <[email protected]> wrote:
Ken Moffat wrote:
On Sat, Mar 10, 2018 at 02:38:57AM +0000, Hans Malissa wrote:
I've finished compiling LFS 8.2-systemd without problems, and now I'm starting
to work on BLFS.
I have a question regarding the "Setting a smaller screen size in grub" section
in chapter 3: I've tried several screen size settings for the 'video=' parameter in the
grub command line, but none of them seem to have an effect, and I always end up with an
old fashioned 80x25 text display. I know that in another Linux distribution running on
the same computer, the screen resolution is 1440x900, so it's not a hardware issue. I'm
assuming that I need a particular kernel module to get this working, but I can't figure
out which one.
Thanks a lot,
Probably whichever framebuffer your video card uses - I think I
used to use video= on my servers, but I've now switched those to
using a larger font (14x28).
For the kernel video is going to need video=radeonfb:1440x900-32 (radeon as
example, could be nvidiafb matroxfb, etc)
On a radeon which will be using Xorg,
CONFIG_DRM_RADEON works - if it is a server, one of the CONFIG_FB
devices is probably the right choice.
Depending on how you want your device to work, it took me a while with radeon.
While video= used to be fine with the kernel, the grub option for video
resolution gets passed to the video driver as a payload. I think it is gfxmode
that does it. For me I had to use CONFIG_DRM=y and CONFIG_DRM_RADEON=y. I do
not know if the KMS helper and KMS_FB helper are required. Also, you'll need
frame buffer in kernel as CONFIG_FB=y. I wouldn't select the framebuffer radeon
driver. Use the DRM radeon driver. I've been using that since A4-3400 days. It
works fine with the current A8-3800. Similar with other GPU's, use the DRM
driver if it is available.
Keep adjusting the config until something works.
On my test server with an old radeon I also dropped back to 80x25
when I upgraded to 8.2, and failed to load the intended large font.
That was because my notes suggested I only needed a few of the
radeon firmware blobs : in fact, on my previous build I had dropped
all of them into /lib/firmware - adding a few more made the large
font work, so if you are on radeon or amdgpu then you might need the
firmware to get a framebuffer console working.
Yes the required firmware will be required for certain graphics devices.
Especially radeon. Look at the kernel messages to make sure the firmware was
loaded. If not, you should see messages that firmware was not loaded because it
wasn't found.
What I do is load the firmware into the kernel as blobs:
CONFIG_FW_LOADER=y
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_EXTRA_FIRMWARE="radeon/SUMO_me.bin radeon/SUMO_pfp.bin radeon/SUMO_rlc.bin
radeon/SUMO_uvd.bin rtl_nic/rtl8168f-2.fw"
CONFIG_EXTRA_FIRMWARE_DIR="/lib/firmware"
For me it depends on the font I want to use. On a sysV system I have
terminus fonts installed and set FONT=ter-128n. Of course that doesn't
come into effect until the console init script is run during boot.
I do not know how to do the same thing in systemd, but the simple command
is 'setfont $FONT' where FONT is located in /usr/share/fonts. I do not
think setfont understands ttf fonts, but see the man page for details.
There are ways to put the font you want into the kernel itself during compile
time, but the tools are sparse. For SystemD:
/etc/vconsole.conf: FONT=Lat2-Terminus16 (as an example)
FONT="ter-v32n" for another example
Sincerely,
William Harrington
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Thanks for the advice, everyone.
I did a bit of reading and experimenting myself: my graphics card is NVIDIA
GeForce 9400M, and it turns out that activating 'nouveau' in the kernel
configuration makes it work nicely. lspci -k now says:
03:00.0 VGA compatible controller: NVIDIA Corporation C79 [GeForce 9400M] (rev
b1)
Subsystem: Apple Inc. Device 00ba
Kernel driver in use: nouveau
This seems to resolve the issue. Just out of curiosity: the 'nvidiafb' module
doesn't seem to do anything. What is the difference between 'nouveau' and
'nvidiafb'?
Another question: NVIDIA seems to be offering binary modules for my card
('NVIDIA-Linux-x86_64-340.106'). Does this have any advantages over 'nouveau'?
(On Arch Linux, I've found that the external VGA port works nicely for a dual
monitor configuration with the NVIDIA drivers, whereas I couldn't get it to
work with 'nouveau'.) Has anyone successfully installed the proprietary NVIDIA
modules on a BLFS system?
Thanks a lot,
Hans--
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