These error just fill my logs:
[316094.848311] [drm:radeon_dvi_detect] *ERROR* DVI-I-1: probed a monitor but no|invalid EDID
[316104.895726] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[316104.898492] Raw EDID:
[316104.901300] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.904245] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.907191] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.910137] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.912948] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.915620] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.918152] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.920589] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.951274] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[316104.953906] Raw EDID:
[316104.956597] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.959421] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.962250] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.965081] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.967907] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.970590] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.973136] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316104.975625] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.006315] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[316105.008953] Raw EDID:
[316105.011641] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.014475] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.017310] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.020144] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.022982] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.025683] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.028234] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.030689] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.061394] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
[316105.064038] Raw EDID:
[316105.066736] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.069589] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.072429] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.075263] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.078103] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.080804] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.083339] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.085794] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[316105.088272] radeon 0000:0c:01.0: DVI-I-1: EDID block 0 invalid.
[316105.088275] [drm:radeon_dvi_detect] *ERROR* DVI-I-1: probed a monitor but no|invalid EDID
Is there aything I can do to suppress them or tell the driver to probing the monitor or disable DVI port?
I'm running Debian 7 with only a cli as a LAMP server. THere is no GDM nor GUI nor anything like that.
Fix it by: editing /etc/default/grub
update grub
update-grub
reboot