Xorg - Resolution issues

[Francis Dubé]

Francis Dubé wrote :
> Hi everyone,
>
> I got this TV : 
> http://www.samsung.com/ca/consumer/detail/spec.do?group=tv&type=tv&subtype=lcd&model_cd=LN40A330J1DXZC&fullspec=F 
>
>
> I'm trying to use it as my screen under FreeBSD 7.1-RELEASE with a 
> resolution of 1366x768 which is suposed to be suported by the TV, 
> acording with the TV's specs. I did the same with another very similar 
> TV and it was working #1 without having to create any Xorg.conf, a 
> plain startx and the display was perfect (1366x768).
>
> With my new TV, X only start in 1280x720. So I created a config file 
> with Xorg -configure, then I tried to force Xorg to use 1366x768 but 
> it keeps loading in 1280x720. In my Xorg.0.log it looks like there's 
> no support for the resolution I want :
>
> [...]
> (==) Using config file: "/etc/X11/xorg.conf"
> [...]
> (II) RADEON(0): Panel infos found from DDC detailed: 1280x720
> [...]
> (II) RADEON(0): Supported additional Video Mode:
> (II) RADEON(0): clock: 74.2 MHz   Image Size:  160 x 90 mm
> (II) RADEON(0): h_active: 1280  h_sync: 1390  h_sync_end 1430 
> h_blank_end 1650 h_border: 0
> (II) RADEON(0): v_active: 720  v_sync: 725  v_sync_end 730 v_blanking: 
> 750 v_border: 0
> (II) RADEON(0): Supported additional Video Mode:
> (II) RADEON(0): clock: 74.2 MHz   Image Size:  160 x 90 mm
> (II) RADEON(0): h_active: 1920  h_sync: 2008  h_sync_end 2052 
> h_blank_end 2200 h_border: 0
> (II) RADEON(0): v_active: 540  v_sync: 542  v_sync_end 547 v_blanking: 
> 562 v_border: 0
> (II) RADEON(0): Ranges: V min: 23  V max: 61 Hz, H min: 26  H max: 68 
> kHz, PixClock max 150 MHz
> (II) RADEON(0): Monitor name: SAMSUNG
> [...]
> (II) RADEON(0): Output DVI-0 using initial mode 1280x720
> [...]
>
> This is how i configured my resolution in my /etc/X11/xorg.conf :
> [...]
> Section "Screen"
>        Identifier "Screen0"
>        Device     "Card0"
>        Monitor    "Monitor0"
>        DefaultDepth 24
>        SubSection "Display"
>                Viewport   0 0
>                Depth     24
>                Modes   "1366x768"
>        EndSubSection
> EndSection
> [...]
>
> My video card is a Radeon HD 3450 and my Xorg version is xorg-7.3_2
>
> Also, the only other resolution "supported" by the TV according to the 
> log file would be 1920x540...but it's not supported by the TV !
>
> Am I missing something ?
>
> Thanks for reading.
>
> Francis
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I had this problem last month, I tought it was fixed using this little 
trick suggested by Polytropon :

Polytropon wrote :
> If it doesn't work, there's always an option to use xrandr via
> ~/.xinitrc:
>
>     xrandr --size 1366x768 &
>     xrandr --fb 1366x768 &
>
> I have a similar issue with the "ati" driver, using an ATI Radeon 9200
> (RV250) which I need to force to 1400x1050 (worked with old XFree86
> and the setting in the config file, as you mentioned it). The
> autodetection of the screen (21" CRT) leads to stupid values that
> are completely unusable.
The screen is located far from my office so I can't be in front of it to 
test, that's why I haven't spotted it wasn't working. I tought it was 
because when i take a screenshot with 'scrot' i get a full screenshot in 
1366x768 and everything is clean, but the TV itself shows a 1280x720 
display. I should've watched the Xorg's log instead of simply assuming 
it was working with a screenshot, but anyway now my problem is the same 
: The PC is configured in 1366x768, but the TV don't care and shows a 
1280x720.

Anyone got a similar issue and a way to fix it ?

Thanks,

Francis Dubé