graphics - Ubuntu 16.04, RX 480, AMDGPU-Pro, monitor broken? - Ask Ubuntu


so i've got strange problem here. have rx 480, 3 monitors hooked up. 1 dvi-d, hdmi , displayport. working, wanted monitors display height aligned bit messing xrandr's --pos command , entered "wrong" apparently. displayport monitor appears have broken this, won't show signal anymore. doesn't show connected in way computer anymore -- not in bios worked previously. i've tried unplugging-replugging power , connection computer, removing , reinstalling amdgpu-pro drivers, deleting monitors.xml ... pretty think of can't monitor work @ anymore. dvi , hdmi monitors still work fine , driver working otherwise.. xrandr , these drivers have broken monitor?? seems bizarrely unlikely --pos

i don't have windows can't test in there...

dmesg shows following possibly interesting indecipherable errors on displayport..

[    0.852451] [drm] [conn_detect]  [dp-1] rx caps: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ [    0.883877] [drm] [conn_lktn]    [dp-1] hbr3x4 fail vs=0, pe=0^ [    0.963847] [drm] [conn_lktn]    [dp-1] hbr3x4 fail vs=0, pe=0^ [    1.091954] [drm] [conn_lktn]    [dp-1] hbr3x4 fail vs=0, pe=0^ [    1.271866] [drm] [conn_lktn]    [dp-1] hbr3x4 fail vs=0, pe=0^ [    1.504231] [drm] [conn_lktn]    [dp-1] hbr2x4 fail vs=0, pe=0^ [    1.583914] [drm] [conn_lktn]    [dp-1] hbr2x4 fail vs=0, pe=0^ [    1.711894] [drm] [conn_lktn]    [dp-1] hbr2x4 fail vs=0, pe=0^ [    1.891906] [drm] [conn_lktn]    [dp-1] hbr2x4 fail vs=0, pe=0^ [    2.124297] [drm] [conn_lktn]    [dp-1] hbrx4 fail vs=0, pe=0^ [    2.203928] [drm] [conn_lktn]    [dp-1] hbrx4 fail vs=0, pe=0^ [    2.331981] [drm] [conn_lktn]    [dp-1] hbrx4 fail vs=0, pe=0^ [    2.511988] [drm] [conn_lktn]    [dp-1] hbrx4 fail vs=0, pe=0^ [    2.748337] [drm] [conn_lktn]    [dp-1] rbrx4 fail vs=0, pe=0^ [    2.831967] [drm] [conn_lktn]    [dp-1] rbrx4 fail vs=0, pe=0^ [    2.963976] [drm] [conn_lktn]    [dp-1] rbrx4 fail vs=0, pe=0^ [    3.147979] [drm] [conn_lktn]    [dp-1] rbrx4 fail vs=0, pe=0^ [    3.380091] [drm] [conn_lktn]    [dp-1] hbr3x2 fail vs=0, pe=0^ [    3.459581] [drm] [conn_lktn]    [dp-1] hbr3x2 fail vs=0, pe=0^ [    3.587580] [drm] [conn_lktn]    [dp-1] hbr3x2 fail vs=0, pe=0^ [    3.767607] [drm] [conn_lktn]    [dp-1] hbr3x2 fail vs=0, pe=0^ [    3.999990] [drm] [conn_lktn]    [dp-1] hbr2x2 fail vs=0, pe=0^ [    4.079624] [drm] [conn_lktn]    [dp-1] hbr2x2 fail vs=0, pe=0^ [    4.207625] [drm] [conn_lktn]    [dp-1] hbr2x2 fail vs=0, pe=0^ [    4.387637] [drm] [conn_lktn]    [dp-1] hbr2x2 fail vs=0, pe=0^ [    4.620177] [drm] [conn_lktn]    [dp-1] hbrx2 fail vs=0, pe=0^ [    4.699669] [drm] [conn_lktn]    [dp-1] hbrx2 fail vs=0, pe=0^ [    4.827668] [drm] [conn_lktn]    [dp-1] hbrx2 fail vs=0, pe=0^ [    5.007680] [drm] [conn_lktn]    [dp-1] hbrx2 fail vs=0, pe=0^ [    5.244001] [drm] [conn_lktn]    [dp-1] rbrx2 fail vs=0, pe=0^ [    5.327699] [drm] [conn_lktn]    [dp-1] rbrx2 fail vs=0, pe=0^ [    5.459721] [drm] [conn_lktn]    [dp-1] rbrx2 fail vs=0, pe=0^ [    5.643721] [drm] [conn_lktn]    [dp-1] rbrx2 fail vs=0, pe=0^ [    5.875848] [drm] [conn_lktn]    [dp-1] hbr3x1 fail vs=0, pe=0^ [    5.955487] [drm] [conn_lktn]    [dp-1] hbr3x1 fail vs=0, pe=0^ [    6.083499] [drm] [conn_lktn]    [dp-1] hbr3x1 fail vs=0, pe=0^ [    6.263504] [drm] [conn_lktn]    [dp-1] hbr3x1 fail vs=0, pe=0^ [    6.495900] [drm] [conn_lktn]    [dp-1] hbr2x1 fail vs=0, pe=0^ [    6.575537] [drm] [conn_lktn]    [dp-1] hbr2x1 fail vs=0, pe=0^ [    6.703539] [drm] [conn_lktn]    [dp-1] hbr2x1 fail vs=0, pe=0^ [    6.883554] [drm] [conn_lktn]    [dp-1] hbr2x1 fail vs=0, pe=0^ [    7.115867] [drm] [conn_lktn]    [dp-1] hbrx1 fail vs=0, pe=0^ [    7.195581] [drm] [conn_lktn]    [dp-1] hbrx1 fail vs=0, pe=0^ [    7.323585] [drm] [conn_lktn]    [dp-1] hbrx1 fail vs=0, pe=0^ [    7.503591] [drm] [conn_lktn]    [dp-1] hbrx1 fail vs=0, pe=0^ [    7.740129] [drm] [conn_lktn]    [dp-1] rbrx1 fail vs=0, pe=0^ [    7.823612] [drm] [conn_lktn]    [dp-1] rbrx1 fail vs=0, pe=0^ [    7.955633] [drm] [conn_lktn]    [dp-1] rbrx1 fail vs=0, pe=0^ [    8.139657] [drm] [conn_lktn]    [dp-1] rbrx1 fail vs=0, pe=0^ 

solved. tried booting off of usb key didn't have drivers support rx 480. ;( new 1440p benq gw2765. fixed plugging computer via hdmi -- worked. plugged dp , continued work.

my guess monitor has kind of buggy behavior , needs treated kid gloves. well, cheap 27 inch 1440p, guess know why lol.


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