Description of problem:
Recognition of HDMI displays seems to be half-broken:
Steps to reproduce:
1. Connect a screen with HDMI
2. try to activate it
xrandr doesn't recognize it ("DFP1 disconnected"). With 11.5 I remember it activating immediately.
When connecting and when disconnecting this line gets written to the logs:
[fglrx:fireglAsyncioIntEnableMsgHandler] *ERROR* IRQMGR returned error 1 when trying to enable interrupt source 20100000
The HDMI connected screen being accessible through xrandr.
Connecting a screen with VGA still works well as in 11.5.
I have found some oddities when trying to activate the screen. This is a screen that has HDMI input (actually it is DVI, I use an adapter that worked fine with 11.5 and intel graphics so it shouldn't be the problem) and VGA input.
I connect the screen to the VGA input and activate it with
xrandr --output CRT1 --mode 1600x1200 --right-of LVDS
Then I disconnect the screen from VGA without disabling it first and connect it to HDMI.
Upon running xrandr with no arguments then xrandr segfaults (?)
~ % xrandr
Screen 0: minimum 320 x 200, current 3200 x 1200, maximum 4000 x 4000
LVDS connected 1600x900+0+0 (normal left inverted right x axis y axis) 382mm x 214mm
DFP1 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 408mm x 306mm
 8251 segmentation fault (core dumped) xrandr
After that the HDMI screen immediately activates and works flawlessly.
I discovered that I don't even need to activate the screen with VGA.
So I do this:
I connect the screen with VGA but don't activate it. I confirm with xrandr that indeed DDC data is read.
I then disconnect it and connect it to HDMI. The error line gets written to the log and nothing happens.
In this case running xrandr won't segfault but display this error message:
~ % xrandr
xrandr: server did not report mode 0xb3 for output DFP1
After this the HDMI screen also works flawlessly.
Created attachment 157 [details]
I have the same problem in my laptop.
anyone have news about this issue?
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