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Old 12-16-05, 05:59 PM   #38
Dr. Tyrell
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Join Date: Aug 2004
Posts: 100
Default Re: 8174 hangs my laptop on starting X

8174 is obviously buggy, for all previous drivers have allowed my clock to be detected, or at least all valid modelines to actually work. Toshiba 5105-S501

Now though, if my modelines are calculated with a dotclock greater than that 108MHz shown in my xorg logs, it does not accept them. So i'm limited. I suspect you guys are too.
Steps to get things working ...
1. "options nvidia NVreg_SoftEDIDs=0 NVreg_Mobile=1" in modprobe.conf #MUST

2. in Xorg.conf...
Option "ExactModeTimingsDVI" "1" #{and a good, calculated modeline or two}
Option "UseEdidDpi" "0" #{this is also turned off by option DPI}
Option "IgnoreEDID" "1" #{MUST}
Option "DPI" "116 x 116" #{or whatever yours is}
Option "AllowDDCCI" "0" #{maybe, doesn't have effect for ****

3. Turn off vesafb in lilo.conf, either by vga=normal, or just erase that line and run lilo

4. Get videogen and make a modeline for your max dotclock and X/Y .
{since 8174 is forcing me to 108MHz or less,
I used 'videogen -m=1400x1050 -mdc=108 -mhf=110 -mvf=60' and got
'Modeline "1400x1050_videogen108" 108.00 1400 1440 1488 1744 1050 1052 1055 1105 # 108 MHz, 61.9 kHz, 56.0 Hz'

...and yes, I am limited to that 56Hz Vrefresh.

The 108 max comes from the fact that all experiments with all settings varied prove that 8174 ALWAYS limits my dotclock to that number, your mileage may vary. Xorg's nv driver and previous Nvidia drivers do not.
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