Bug 197436 - No DPMS on R128 with DFP monitor (includes patch)
No DPMS on R128 with DFP monitor (includes patch)
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-ati (Show other bugs)
All Linux
medium Severity medium
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Assigned To: X/OpenGL Maintenance List
Depends On:
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Reported: 2006-07-01 09:30 EDT by Ronald Wahl
Modified: 2007-11-30 17:11 EST (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2006-09-29 17:54:46 EDT
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Attachments (Terms of Use)
DPMS support for DFP on R128 (784 bytes, patch)
2006-07-01 11:35 EDT, Ronald Wahl
no flags Details | Diff

  None (edit)
Description Ronald Wahl 2006-07-01 09:30:46 EDT
Description of problem:

No DPMS on DFP monitor with ATI R128.

Version-Release number of selected component (if applicable):

currently xorg-x11-drv-ati-

How reproducible:


Steps to Reproduce:
1. xset dpms force off
Actual results:

screen blanks, background light remains on; monitor sometimes gives signal error

Expected results:

monitor goes off

Additional info:

Before I used fedora I had my Xfree compiled by myself. To get DPMS working I
need to add the following patch to the driver:


--- xc/programs/Xserver/hw/xfree86/drivers/ati/r128_driver.c.orig      
2003-07-29 23:45:08.000000000 +0200
+++ xc/programs/Xserver/hw/xfree86/drivers/ati/r128_driver.c    2003-07-29
23:50:00.000000000 +0200
@@ -3651,6 +3651,18 @@
        OUTREGP(R128_CRTC_EXT_CNTL, mask, ~mask);
+    if(info->isDFP) {
+       switch (PowerManagementMode) {
+       case DPMSModeOn:
+           OUTREG(R128_FP_GEN_CNTL, INREG(R128_FP_GEN_CNTL) | (R128_FP_FPON |
+           break;
+       case DPMSModeStandby:
+       case DPMSModeSuspend:
+       case DPMSModeOff:
+           OUTREG(R128_FP_GEN_CNTL, INREG(R128_FP_GEN_CNTL) & ~(R128_FP_FPON |
+           break;
+       }
+    }
 static int r128_set_backlight_enable(ScrnInfoPtr pScrn, int on);


I haven't tried this patch on the current driver version but I guess it will
more or less apply. It would be nice if we could have a r128 driver that
supports DPMS on DFP monitors.

Comment 1 Ronald Wahl 2006-07-01 11:35:56 EDT
Created attachment 131839 [details]
DPMS support for DFP on R128

Meanwhile I have tried te patch against xorg-x11-drv-ati- and it
I add the current patch as file here.
Comment 2 Adam Jackson 2006-09-29 17:54:46 EDT
I've applied this upstream and to our ati driver, thanks!

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