On 12/09/14 13:03, André Silva wrote: > On 09/12/2014 07:35 AM, Jorge Lopez wrote: > > I don't need AGP support because my card is PCI-E. > > So, i think you have have problems with the resolution. If you are > doing early KMS, you must construct your own EDID or you will run into > problems. > The makefile included in the Documentation/EDID sources of the kernel. [0] > It says "The code (see drivers/gpu/drm/drm_edid_load.c) contains > built-in data sets for commonly used screen resolutions (800x600, > 1024x768, 1280x1024, 1600x1200, 1680x1050, 1920x1080) as binary blobs, > but the kernel source tree does not contain code to create these > data.", therefore it is nonfree! It should be reported to Linux-libre > developers :S > So, in my opinion you should follow the Late start mode [1] and pay > attention on the first part that says > "Remove all vga= options from the kernel line in the bootloader > configuration file. Using other framebuffer drivers (such as uvesafb > or radeonfb) will conflict with KMS. Remove any framebuffer related > modules from /etc/mkinitcpio.conf. video= can now be used in > conjunction with KMS." > There is a part that says "video= can now be used in conjunction with > KMS", if the problem persists specifying resolution with video= > command line may be useful. A mode can be forced on the kernel command > line, but the command line option video is poorly documented in the > DRM case. Bits and pieces on how to use it can be found in [2][3] or > if you are using GRUB, check [4] > > [0]:https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/Documentation/EDID/HOWTO.txt > [1]:https://wiki.archlinux.org/index.php/ATI#Late_start > [2]:http://cgit.freedesktop.org/nouveau/linux-2.6/tree/Documentation/fb/modedb.txt > [3]:http://cgit.freedesktop.org/nouveau/linux-2.6/tree/drivers/gpu/drm/drm_fb_helper.c > [4]:https://wiki.archlinux.org/index.php/GRUB#Setting_the_framebuffer_resolution I use de KMS start later and I edit boot options in /etc/default/grub GRUB_GFXMODE=1024x768x31
Now the radeon works without nomodeset in boot options _______________________________________________ Dev mailing list [email protected] https://lists.parabolagnulinux.org/mailman/listinfo/dev
