Bug#465864: xserver-xorg-video-ati: xserver freezes the computer on startup

[Alex Deucher]

On Wed, Feb 27, 2008 at 7:01 PM, Jiří Paleček <jpalecek at web.de> wrote:
> On Wed, 27 Feb 2008 23:32:24 +0100, Alex Deucher <alexdeucher at gmail.com>
>  wrote:
>
>
>  > 2008/2/27 Jiri Palecek <jpalecek at web.de>:
>  >>
>  >> On Monday 25 February 2008 18:18:32 Alex Deucher wrote:
>
> >>  > There's something about 1400x1050 mode that the driver doesn't like.
>  >>  > if you remove the preferred mode from your monitor section, does the
>  >>  > server come up?  You might want to try another modeline for
>  >> 1400x1050.
>  >>
>  >>  Indeed, the server started with the "PreferredMode" commented out.
>  >> However,
>  >>  changing the mode to this mode hang the computer.
>  >>
>  >>  What other modeline do you mean? I copied this one from earlier xorg,
>  >> where it
>  >>  was autodetected.
>  >
>  > try cvt:
>  >
>  > $ cvt 1400 1050 60
>  > # 1400x1050 59.98 Hz (CVT 1.47M3) hsync: 65.32 kHz; pclk: 121.75 MHz
>  > Modeline "1400x1050_60.00"  121.75  1400 1488 1632 1864  1050 1053
>  > 1057 1089 -hsync +vsync
>  >
>  > $ cvt 1400 1050 75
>  > # 1400x1050 74.87 Hz (CVT 1.47M3) hsync: 82.28 kHz; pclk: 156.00 MHz
>  > Modeline "1400x1050_75.00"  156.00  1400 1504 1648 1896  1050 1053
>  > 1057 1099 -hsync +vsync
>
>  OK. So I tried this:
>
>  Section "Monitor"
>          Identifier      "Generic Monitor"
>          Option          "DPMS"
>          HorizSync       30-95
>          VertRefresh     50-160
>          Modeline        "1400x1050"  184.00  1400 1464 1656 1960  1050
>  1051 1054 1100 +hsync +vsync
>  # 1400x1050 84.96 Hz (CVT 1.47M3) hsync: 93.88 kHz; pclk: 179.50 MHz
>  Modeline "1400x1050_85.00"  179.50  1400 1512 1656 1912  1050 1053 1057
>  1105 -hsync +vsync
>
> # 1400x1050 74.87 Hz (CVT 1.47M3) hsync: 82.28 kHz; pclk: 156.00 MHz
>  Modeline "1400x1050_75.00"  156.00  1400 1504 1648 1896  1050 1053 1057
>  1099 -hsync +vsync
>
> # 1400x1050 59.98 Hz (CVT 1.47M3) hsync: 65.32 kHz; pclk: 121.75 MHz
>  Modeline "1400x1050_60.00"  121.75  1400 1488 1632 1864  1050 1053 1057
>  1089 -hsync +vsync
>          Option          "PreferredMode" "1400x1050"
>  EndSection
>
>  The 60 an 75 Hz variants work under 6.8.0, the 85 Hz doesn't.

Strange.  you might try tweaking it slightly, maybe 87 Hz, etc.

Alex