Date: Thu, 24 Feb 2011 21:15:42 GMT From: Tom Russo <tom.km5vy@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: ports/155011: nvidia-settings versions 195 and above fail to allow display configuration with legacy nvidia-driver versions Message-ID: <201102242115.p1OLFgRp097692@red.freebsd.org> Resent-Message-ID: <201102242120.p1OLK8E6064276@freefall.freebsd.org>
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>Number: 155011 >Category: ports >Synopsis: nvidia-settings versions 195 and above fail to allow display configuration with legacy nvidia-driver versions >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-ports-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Feb 24 21:20:08 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Tom Russo >Release: 7.4-PRERELEASE >Organization: >Environment: FreeBSD bogodyn.org 7.4-PRERELEASE FreeBSD 7.4-PRERELEASE #0: Sat Jan 1 21:48:22 MST 2011 russo@bogodyn.org:/users2/obj/usr/src/sys/BOGODYN i386 >Description: Beginning with nvidia-settings 195 and ever since, the "X Server Display Configuration" panel has produced an error "Failed to query NoScanout for screen 0" and refused to allow display configuration if a "legacy" version of the driver is installed (e.g. nvidia-driver-71, nvidia-driver-95 or nvidia-driver-173). That is because the "NoScanout" property was added in nvidia-driver 195, and the settings program treats not finding it as an error, guaranteeing that the latest nvidia-settings will be broken when used on a machine with legacy drivers. Unless the nvidia-settings port is tweaked to install versions of nvidia-settings matching the installed driver, nvidia-settings needs to be patched in order to prevent this breakage. >How-To-Repeat: Install an older NVIDIA video card requiring a legacy NVIDIA driver and install the appropriate legacy driver. Install the latest nvidia-settings port (which at this time is version 270.18). Run nvidia-settings and click "X Server Display Configuration." You will get a screen that shows "Unable to load X Server Display Configuration Page: Failed to query NoScanout for screen 0." There is at that point no way to manipulate display configuration through the GUI. >Fix: The attached patch comments out the code that treats a missing NoScanout property as an error, and returns instead a response to indicate NoScanout is disabled. This patch is copied from Ubuntu's bug tracker, where it is part of the nvidia-settings package build process. http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/lucid/nvidia-settings/lucid/revision/27 This patch allows nvidia-settings' X Server Display Configuration panel to work properly with legacy nvidia-driver ports. The only difference between the attached patch and Ubuntu's is that I have used "#if 0/#endif" preprocessor directives to disable the code rather than C comments. Patch attached with submission follows: --- src/gtk+-2.x/ctkdisplayconfig-utils.c.orig 2011-02-24 13:55:03.000000000 -0700 +++ src/gtk+-2.x/ctkdisplayconfig-utils.c 2011-02-24 13:56:05.000000000 -0700 @@ -2103,11 +2103,14 @@ /* See if the screen is set to not scanout */ ret = NvCtrlGetAttribute(screen->handle, NV_CTRL_NO_SCANOUT, &val); if (ret != NvCtrlSuccess) { +#if 0 *err_str = g_strdup_printf("Failed to query NoScanout for " "screen %d.", screen_id); nv_warning_msg(*err_str); goto fail; +#endif + val = NV_CTRL_NO_SCANOUT_DISABLED; } screen->no_scanout = (val == NV_CTRL_NO_SCANOUT_ENABLED); >Release-Note: >Audit-Trail: >Unformatted:
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