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Old 06-09-05, 10:00 AM   #1
D800
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Angry Driver 7664 lost 1920x1200 resolution

I just upgraded my Linux NVIDIA driver to the 7664 release and can no longer run my display at its native resolution of 1920x1200.

This is a Dell D800 running Fedora Core 2. Prior to this driver release, 1920x1200 has worked fine.

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Old 06-09-05, 10:57 AM   #2
Lithorus
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Default Re: Driver 7664 lost 1920x1200 resolution

Please attach the log and config files. Even better, use the bugreport script.
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Old 06-09-05, 11:29 AM   #3
D800
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Default Re: Driver 7664 lost 1920x1200 resolution

xorg.conf :


# XFree86 4 configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"

# RgbPath is the location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "unix/:7100"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "record"
Load "freetype"
Load "type1"
Load "glx"
EndSection

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# Or if you just want both to be control, use:
# Option "XkbOptions" "ctrl:nocaps"
#
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Dell"
ModelName "Dell 1920x1200 Laptop Display Panel"
HorizSync 31.5 - 100.0
VertRefresh 30.0 - 90.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "Nvidia"
BoardName "NVIDIA GeForce 4 (generic)"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1920x1200" "1600x1200" "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

--------------------------------------------------------

nvidia-bug-report :

attached
Attached Files
File Type: zip nvidia-bug-report.zip (19.1 KB, 163 views)
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Old 06-09-05, 11:45 AM   #4
D800
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Angry Re: Driver 7664 lost 1920x1200 resolution

The following line in the nvidia-debug script seems pertinent:

(II) NVIDIA(0): Virtual screen size determined to be 1600 x 1200


The problem is that it's wrong! This is a 1920x1200 display
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Old 06-09-05, 11:49 AM   #5
beczka2005
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Default Re: Driver 7664 lost 1920x1200 resolution

Hi,

There are several posts (including mine) about this, please search the bulleting first before posting.

If your problem is the same as mine, your pixel clock is detected to be something different (lower) than in the previous nvidia driver releases. In my case, before 7664 it was detected as 350MHz which is around 80Hz refresh at 1920x1200. With the new driver it was detected as 165MHz, meaning I had to drop my refresh rate to about 50Hz.

So you have two options: 1) Find a modeline generator (lots on web but some give bad results) and enter the pixel clock which should be listed in your xorg.log along with your resolution and generate a new modeline. 2) Revert back to the old driver.

In my case, I went with option 2. I don't understand why all of a sudden my pixel clock is detected to be 1/2 of what it was before. Also my system does not wake up from susped with the new driver.


Hope that helps,
Raf
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Old 06-09-05, 12:07 PM   #6
D800
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Default Re: Driver 7664 lost 1920x1200 resolution

Quote:
Originally Posted by beczka2005
There are several posts (including mine) about this, please search the bulleting first before posting.
Actually I did, but a search presumes one knows the magic words. I searched on "1920", I didn't know to search on "pixel clock"

Quote:
Originally Posted by beczka2005
So you have two options: 1) Find a modeline generator (lots on web but some give bad results)
Can you suggest one that doesn't give bad results?

Quote:
Originally Posted by beczka2005
Hi,
In my case, I went with option 2. I don't understand why all of a sudden my pixel clock is detected to be 1/2 of what it was before. Also my system does not wake up from susped with the new driver.
So there is in fact a problem with the new driver?

Thanks!
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Old 06-09-05, 01:51 PM   #7
D800
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Default Re: Driver 7664 lost 1920x1200 resolution

Quote:
Originally Posted by D800
Actually I did, but a search presumes one knows the magic words. I searched on "1920", I didn't know to search on "pixel clock"
My mistake! I don't know what I did before, but apparently I FUBAR'd my first search. It is there!
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Old 06-09-05, 04:25 PM   #8
D800
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Smile Re: Driver 7664 lost 1920x1200 resolution

Got it back !

This is what worked for me on my Dell D800 to get 1920x1200 mode back with the new driver.

I still think this is a driver bug, but here's the work around:

Section "Monitor"
...
ModeLine "1920x1200" 162 1920 1984 2176 2480 1200 1201 1204 1250 +hsync +vsync
ModeLine "1680x1050" 147.14 1680 1784 1968 2256 1050 1051 1054 1087 +hsync +vsync
Modeline "1600x1024" 198.832 1600 1712 1888 2176 1024 1027 1030 1075 +hsync +vsync
ModeLine "1440x900" 130 1440 1452 1572 1896 900 901 904 937 +HSync +VSync
ModeLine "960x600" 60 960 968 1048 1264 600 601 603 625 +HSync +VSync


NOTE that I've only tested the 1920x1200 modeline

Section "Device"
...
Option "IgnoreEDID" "True"

This last over rides the driver generated numbers which are wrong, hence "A Bug".
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Old 06-10-05, 08:50 AM   #9
beczka2005
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Default Re: Driver 7664 lost 1920x1200 resolution

Actually how do you know the numbers generated by the driver are wrong? I saw a post saying all drivers up to the current 7664 have had a bug where the pixel clock was incorrectly detected. They say only now it is correct and the current numbers should be used.

It still breaks my susped to RAM so I'm not going to use this release. Although the coolbits option sounds good to save some battery life.

-Raf
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Old 06-10-05, 02:21 PM   #10
zander
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Default Re: Driver 7664 lost 1920x1200 resolution

@beczka2005: 1.0-7664 reports the correct maximum pixel clock, but it doesn't consider reduced blanking when validating modes; this will be addressed in a future driver release.
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Old 06-12-05, 02:24 AM   #11
beczka2005
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Default Re: Driver 7664 lost 1920x1200 resolution

zander: Thanks for the response. Not sure (at all) what you mean by "doesn't consider reduced blanking when validating modes." What does that mean in terms of pixel clock refresh rate etc.

Also, any idea what in the new 7664 driver broke suspend to RAM? I am currently able (with previous driver) to suspend and resume without problems. I do have to `kick start` my screen back to life by changing to vt1 and then back to vt7. But with the new driver nothing happens when I do this. Is this a bug?

Thanks.
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Old 12-08-05, 10:14 PM   #12
linnv
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Default Re: Driver 7664 lost 1920x1200 resolution

This appears to still be a problem with the 8174 driver.
I'm using a Dell 2405 panel with a default resolution of 1920x1200 and a GeForce FX 5200 Ultra. It works great in 7174 with an EDID derived modeline of:

Modeline "1920x1200" 154.0 1920 1968 2000 2080 1200 1203 1209 1235

and Option "ExactModeTimingsDVI" "on"

However when I use the same for 8174 I get the same message I did when attempting to use 7676 and 7667:

(II) NVIDIA(0): Not using mode "1920x1200" (bad mode clock/interlace/doublescan)


I have X server logs for both working and non-working drivers if those would be helpful but it seems to be the same issue.

Is there an expected future release that this will be fixed in?
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