Ubuntu
nvidia-graphics-drivers-180 package

Acer X193W refresh rate not detected correctly

Bug #498173 reported by Dan Dart
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
nvidia-graphics-drivers-180 (Ubuntu)
New
Undecided
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Bug Description

My X193W monitor on NVIDIA 8500GT was detected to be at 60Hz which is wrong. This causes flickering and weird lines going down the screen.
Setting the rate to 75Hz fixed this in KDE's System Settings helps, but on bootup it saves it wrongly, and it goes back to 60Hz until I click into the Display settings dialog, when instantly it gets it right without altering the settings.

Also, the NVIDIA driver displays 60Hz as 50Hz in KDE's settings (and GNOME's), and 75Hz as 51Hz.

In nvidia-settings it displays properly (as 60Hz and 75Hz) but still won't save the settings because it "cannot parse /etc/X11/xorg.conf" as it doesn't exist anymore.

Revision history for this message
Monkey (monkey-libre) wrote :

I´ve assigned this bug to the xorg package. Thank You for making Ubuntu better.

affects: ubuntu → xorg (Ubuntu)
Timo Aaltonen (tjaalton)
affects: xorg (Ubuntu) → nvidia-graphics-drivers-180 (Ubuntu)
Revision history for this message
Dan Dart (dandart) wrote :

It also happens in Xorg, with nv.

Revision history for this message
madbiologist (me-again) wrote :

I'm not sure what is going on here, but I don't think it's caused by the refresh rate. LCD's don't really have a refresh rate as such. See http://en.wikipedia.org/wiki/Refresh_rate and http://en.wikipedia.org/wiki/Liquid_crystal_display

Revision history for this message
Jerry Story (story-jerry) wrote :

It seems that xorg.conf doesn't exist in ubuntu 11.10 or xubuntu 11.10.

I'm running xubuntu 11.10. It boots in a flaky sort of way. During boot, it gives me "Input Not Supported" floating all over the screen, and then after a while it figures out this problem and then boots correctly.

Seems to me it wouldn't be too difficult for the very smart ubuntu programmers, when the OS produces the "Input Not Supported" error or if the monitor is "unknown", to have the OS ask the user for information about the monitor, the type of monitor and the resolution and the refresh rate, and then test these settings and "Is this correct?" and "Do you want to keep these settings?". I hope something like this is done next version of ubuntu and xubuntu. Automatic hardware detection is great but if it doesn't work in a given case, the OS should fall back on asking a question (and testing).

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