Bug 39290 - PreferredMode, TargetRefreshRate and DisplaySize in /etc/X11/xorg.conf.d/50-monitor.conf are ignored
Summary: PreferredMode, TargetRefreshRate and DisplaySize in /etc/X11/xorg.conf.d/50-m...
Status: RESOLVED MOVED
Alias: None
Product: xorg
Classification: Unclassified
Component: Server/General (show other bugs)
Version: unspecified
Hardware: x86 (IA32) All
: medium normal
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-07-16 15:28 UTC by Felix Miata
Modified: 2018-12-13 22:25 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
xrandr output & xorg.conf prepended to Xorg.0.log from Fedora 15 producing 1792x1344@120DPI via DisplaySize, PreferredMode, TargetRefreshRate (50.13 KB, text/plain)
2011-07-16 15:28 UTC, Felix Miata 		no flags Details
xrandr output & 50-monitor.conf prepended to Xorg.0.log from Fedora 15 failing to produce 1792x1344@120DPI via DisplaySize, PreferredMode, TargetRefreshRate (47.90 KB, text/plain)
2011-07-16 15:30 UTC, Felix Miata 		no flags Details
/etc/X11/xorg.conf.d/20-nouveau.conf (860 bytes, application/octet-stream)
2012-09-19 13:25 UTC, Shawn Rutledge 		no flags Details
log file after startx -- --dpi 96, with the attached /etc/X11/xorg.conf.d/20-nouveau.conf (62.50 KB, text/x-log)
2012-09-19 13:29 UTC, Shawn Rutledge 		no flags Details
View All

Description Felix Miata 2011-07-16 15:28:20 UTC 
Created attachment 49187 [details]
xrandr output & xorg.conf prepended to Xorg.0.log from Fedora 15 producing 1792x1344@120DPI via DisplaySize, PreferredMode, TargetRefreshRate

Yesterday I filed https://bugzilla.novell.com/show_bug.cgi?id=706024 because of this, before I knew it wasn't specific to openSUSE Factory.

/etc/X11/xorg.conf.d/50-monitor.conf files containing e.g.:
Section "Monitor"
	Identifier "Default Monitor"
	HorizSync    30-107
	VertRefresh  56-61
	Option       "TargetRefreshRate"	"60"
	Option       "DDC"	"off"
	Option       "DPMS"	"off"
	Option       "DefaultModes"	"on"
	DisplaySize  338 253 # 120 DPI @ 1600x1200
	Option       "PreferredMode" "1600x1200"
EndSection

were working to produce desired refresh, resolution and DPI as recently as server 1.9.3 (openSUSE 11.4). Now in what remains identified as 1.9.3 in openSUSE Factory (12.1), in 1.10.1 in *buntu 11.04, and 1.10.2 in Fedora 15, TargetRefreshRate, PreferredMode & DisplaySize (at least, not checked other options as yet) are apparently being ignored. The exact same section when contained in /etc/X11/xorg.conf still produces expected results for resolution, DPI & refresh.

In contrast, 'option "DRI" "false"' & 'option "Shadow" "true"' contained in either xorg.conf or 50-device.conf are obeyed.
Comment 1 Felix Miata 2011-07-16 15:30:37 UTC 
Created attachment 49188 [details]
xrandr output & 50-monitor.conf prepended to Xorg.0.log from Fedora 15 failing to produce 1792x1344@120DPI via DisplaySize, PreferredMode, TargetRefreshRate
Comment 2 Shawn Rutledge 2012-09-19 13:22:09 UTC 
I agree that's a bug; xorg.conf should really be able to override DisplaySize such that xrandr will show it.
Comment 3 Shawn Rutledge 2012-09-19 13:25:37 UTC 
Created attachment 67382 [details]
/etc/X11/xorg.conf.d/20-nouveau.conf

I try to override DisplaySize 531 298 because for the HDMI monitor it is incorrectly detected; xrandr says this:

DVI-I-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm

HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 160mm x 90mm

even though I tried to override it.
Comment 4 Shawn Rutledge 2012-09-19 13:29:01 UTC 
Created attachment 67383 [details]
log file after startx -- --dpi 96, with the attached /etc/X11/xorg.conf.d/20-nouveau.conf

I started X with startx -- --dpi 96.  xrandr still reports the wrong physical size, but at least xdpyinfo gets the overridden dpi correctly:

  dimensions:    3840x1200 pixels (1016x317 millimeters)
  resolution:    96x96 dots per inch

I think xrandr should get the overridden physical size too.  Otherwise programs which compute DPI for themselves by getting the physical display size and resolution, using xcb, will get it wrong.  Qt does this for example, so Qt programs will have wrong font sizes in this case.
Comment 5 GitLab Migration User 2018-12-13 22:25:25 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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