https://bugs.freedesktop.org/show_bug.cgi?id=75491
Priority: medium Bug ID: 75491 Assignee: dri-devel@lists.freedesktop.org Summary: radeon 0000:05:00.0: Invalid ROM contents (Radeon HD7750 no Monitors connected) Severity: normal Classification: Unclassified OS: Linux (All) Reporter: freedesktop@donewell.de Hardware: x86-64 (AMD64) Status: NEW Version: unspecified Component: DRM/Radeon Product: DRI
Created attachment 94711 --> https://bugs.freedesktop.org/attachment.cgi?id=94711&action=edit bios_dump
I've bought a radeon HD 7750 with 4 mini-DP Connectors and use passive hdmi adapters to connect my 3 Monitors.
kernel version is 3.13.5
on bootup kernel reports:
Feb 25 10:42:32 barfoos24 kernel: radeon 0000:05:00.0: Invalid ROM contents Feb 25 10:42:32 barfoos24 kernel: ATOM BIOS: C44501
After init of drm the montiors goto black.
After reading a lot i managed to get them working by following kernel params:
radeon.modeset=1 radeon.dpm=1 video=DP-1:1920x1200-24@60D video=DP-2:1920x1200-24@60D video=DP-3:1920x1200-24@60D rm_kms_helper.edid_firmware=edid/1920x1200.bin
edid/1920x1200.bin is self compiled edid.
i've attached the dumped bios.
in this configuration the card is working with all 3 monitors, but after screenlog or a console change the screens remain dark.
the kernel log reads:
Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* displayport link status failed Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* displayport link status failed Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed Feb 25 10:44:01 barfoos24 kernel: [drm:radeon_dp_link_train_cr] *ERROR* displayport link status failed