On Mon, Jul 23, 2012 at 6:06 AM, Przemysław Tomczyk <tomczyk.prze...@gmail.com> wrote: > could it be possible that I'd try to communicate with LCD display thru > ddc using i2c-dev module to probe how to access it? maybe this would > help?
You can try accessing the i2c buses exposed by the radeon driver and seeing which one (if any) has the edid for the DVI port using i2c_detect or something similar. Let me know what you find out. Alex > > 2012/7/19 Alex Deucher <alexdeuc...@gmail.com>: >> On Thu, Jul 19, 2012 at 7:25 AM, Przemysław Tomczyk >> <tomczyk.prze...@gmail.com> wrote: >>> Hi and hello to the list, >>> >>> Recently I've received workstation with Xpress 200 card, no DVI >>> output. Kernel is 3.4.4. >>> DVI output goes blank as soon as KMS kicks in. >>> Xorg.log mentions no EDID for DVI-0, but forcing edid from file using >>> drm_kms_helper module didn't help. >>> Now i'm getting "DVI: Failed to assign ddc bus! Check dmesg for i2c >>> errors.", bot no i2c errors in dmesg output. >>> >>> in /sys i c an see nodes for 2 buses: >>> #cat /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:05.0/i2c-2/name >>> Radeon i2c bit bus VGA_DDC >>> # cat /sys/devices/pci0000\:00/0000\:00\:01.0/0000\:01\:05.0/i2c-1/name >>> Radeon i2c bit bus DVI_DDC >>> >>> >>> I have bios dump ready to attach on request. >> >> Please open a bug: >> https://bugs.freedesktop.org/ >> Product: DRI, component: DRM/Radeon >> and attach your xorg log, dmesg output, and a copy of your vbios. To >> get a copy of your vbios: >> (as root) >> (use lspci to get the bus id) >> cd /sys/bus/pci/devices/<pci bus id> >> echo 1 > rom >> cat rom > /tmp/vbios.rom >> echo 0 > rom >> >> Thanks! >> >> Alex _______________________________________________ xorg-driver-ati mailing list xorg-driver-ati@lists.x.org http://lists.x.org/mailman/listinfo/xorg-driver-ati