grsecurity forums

Hi!

I tried to use the newest 2.6.10 patch from [1]. It mostly works fine, but the VESA framebuffer is broken (I only see a black screen). The fb works fine with the upstream kernel, and normal VGA modes work as well.

Is this a known issue?

[1] http://www.grsecurity.net/~spender/grse ... 0935.patch

I had a similar problem before, but it wasn't related to grsec.
Did you select to compile in fonts in the kernel config?

Make sure those options are set in your .config:
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FONTS=y
CONFIG_FONT_8x8=y

Heiko
D -Linux

I just verified that VESA FB works fine with the latest patch.

Heiko

devillinux wrote:I had a similar problem before, but it wasn't related to grsec.
Did you select to compile in fonts in the kernel config?

Make sure those options are set in your .config:
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FONTS=y
CONFIG_FONT_8x8=y

Heiko
D -Linux

The original Ubuntu kernel has slightly different settings (CONFIG_FONTS is not set, meaning the default, and some things are compiled as module) and works fine. I did not change these settings for my kernel. However, I also tried your setup, which does not work neither.

But if it works for you, then the Ubuntu patches might interfere with the grsecurity patch. Thanks for trying!