i810+modesetting: (EE) I810(0): phase 0 out of range

[Sixer]

Hi,

I've got an Intel Mac Mini running Ubuntu Edgy with an i945GM chipset  
hooked up to an HDTV with a 1920x540 native panel. The TV is hooked  
up through DVI --> HDMI, which has been successfully tested under OS  
X on the same machine and screen.

With the i810 driver in conjunction with i915resolution, I wouldn't  
get any valid mode retrieval from the display, i.e. all the modes  
would come out 0x0 Hz 0KHz and Xorg (7.1.1) would not start.

Now that I've installed the xf86-video-intel:modesetting driver by  
Eric Anholt, at least Xorg starts successfully, but I don't get  
anything on screen:

(II) I810(0): Supported additional Video Mode:
(II) I810(0): clock: 74.2 MHz   Image Size:  576 x 324 mm
(II) I810(0): h_active: 1920  h_sync: 2448  h_sync_end 2492  
h_blank_end 2640 h_border: 0
(II) I810(0): v_active: 540  v_sync: 542  v_sync_end 547 v_blanking:  
562 v_border: 0
(II) I810(0): Supported additional Video Mode:
(II) I810(0): clock: 74.2 MHz   Image Size:  576 x 324 mm
(II) I810(0): h_active: 1920  h_sync: 2008  h_sync_end 2052  
h_blank_end 2200 h_border: 0
(II) I810(0): v_active: 540  v_sync: 542  v_sync_end 547 v_blanking:  
562 v_border: 0
(II) I810(0): Monitor name: LT-26S60
(II) I810(0): Ranges: V min: 59  V max: 61 Hz, H min: 15  H max: 46  
kHz, PixClock max 80 MHz
(II) I810(0): Number of EDID sections to follow: 1
(II) I810(0): Valid Mode from Detailed timing table: 1920x540 (ht  
2640 hss 2448 hse 2492 vt 562 vss 542 vse 547)
(II) I810(0): Valid Mode from Detailed timing table: 1920x540 (ht  
2200 hss 2008 hse 2052 vt 562 vss 542 vse 547)
(II) I810(0): Total of 2 DDC mode(s) found.
[...]
(EE) I810(0): I830 Vblank Pipe Setup Failed
(EE) I810(0): Unable to read from SDVOCTRL_E for SDVOC slave 114.
(EE) I810(0): phase 0 out of range
(EE) I810(0): phase 0 out of range

My xorg.conf has the exact vertical and horizontal refresh rates for  
my TV.

I actually prefer to use 1280x720. If I take out the "1920x540"  
resolution from my Modes and leave in 1280x720 however, Xorg will say  
"No modes left for display" and dies. I was able to use 1280x720  
under OS X.

How do I at least get past the "phase 0 out of range" error, and if  
possible, how do I get Xorg to accept a different videomode than the  
native panel resolution?



TIA.


Sixer