https://bugs.freedesktop.org/show_bug.cgi?id=75491
Priority: medium
Bug ID: 75491
Assignee: dri-devel at 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 at 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 at 60D
video=DP-2:1920x1200-24 at 60D video=DP-3:1920x1200-24 at 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
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