Radeon driver + DVI + Syncmaster 2232bw = blank screen

[Fanf]

Binary package hint: xorg

Hello,

Summary
------------

Using ATI radeon driver leads to a blank screen when my screen is connected with DVI.
RadeonHD driver used to work perfectly until I switch to Ubuntu 10.10 where it is no more supported.

Configuration
-------------------

% lspci
01:00.0 VGA compatible controller: ATI Technologies Inc RV610 video device [Radeon HD 2400 PRO]
...

It's a card with a VGA and a DVI output.

My monitor is a Samsung SyncMaster 2232bw. Its native resolution is 1680x1050

Details
----------
I just switch to 10.10 and discovered that the radeonhd driver is no more supported.
Problem: the "radeon" (or "ati", as it's the same) driver does not work well for me:
- if I use the DVI output, I just get a blank screen
- with the VGA output, I get a really *really* bad image, difficult to describe: its blurred, or with kinds of waves, as if there was a lot of interferences. It's almost not usable at 1680x1050, better at lower resolutions

Changing from KMS with radeon.modeset=0 has no consequence.

Trying to not use EDID information (Option "IgnoreEDID" "true") leads to same result.

Fglrx does not work either, at 1680x1050 I get a "flashing" image (screen goes blank every 2 seconds or so), and at lower resolution the screen is flashing (but less frequently)

"Vesa" driver works perfectly, both on VGA and DVI, but I can not use 1680x1050 with them, only 1280x1024 (what is expected with vesa driver).

It uses to work perfectly at 1680x1050 with radeonhd driver.

If I switch my screen for my TV (connected in DVI) with the radeon driver, I get an image in full HD.

So, it seems that there is something wrong with either my card, the screen, or the combination of the two. But for now, with Ubuntu 10.10, I have no solution to have a clean display at my screen native resolution.

Initially posted here http://ubuntuforums.org/showthread.php?t=1587313

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: xorg 1:7.5+6ubuntu3
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic-pae 2.6.35.4
Uname: Linux 2.6.35-22-generic-pae i686
NonfreeKernelModules: fglrx
Architecture: i386
Date: Tue Oct 5 17:26:43 2010
MachineType: System manufacturer P5K
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic-pae root=UUID=969ffa96-e189-4d3c-8b05-14f43aa68841 ro acpi_enforce_resources=lax nosplash nomodeset radeon.modeset=0
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 PATH=(custom, user)
 LANG=fr_FR.utf8
 SHELL=/bin/zsh
SourcePackage: xorg
Symptom: display
XorgConf: Error: [Errno 13] Permission non accordée: '/etc/X11/xorg.conf'
dmi.bios.date: 07/03/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0603
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5K
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0603:bd07/03/2007:svnSystemmanufacturer:pnP5K:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5K
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
glxinfo: Error: command ['glxinfo'] failed with exit code -11:
system:
 distro: Ubuntu
 codename: maverick
 architecture: i686
 kernel: 2.6.35-22-generic-pae

[Fanf (fanf42)]

Added a Xorg.log file from Ubuntu 10.04 with radeonhd driver that work perfectly at screen native size.

I didn't see many differences between the two, at least from what I understand (modeline are the same, etc).
I noticed a difference on PixClock, but that's all.

(II) RADEONHD(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81 kHz, PixClock max 140 MHz
vs
[ 3031.555] (II) RADEON(0): Ranges: V min: 56 V max: 75 Hz, H min: 30 H max: 81 kHz, PixClock max 145 MHz

[eltro5000 (eltro)]

Hi,
I have a very similar problem,
but I don't get any screen to work via dvi and the radeon driver. (But with fglrx it works)
The Screen / TV is recognized correctly (the right resolutions are listed), but I always get a "no-singal" from the screen.

[eltro5000 (eltro)]

Ok sorry, I have to clarify what I just wrote.

Somehow a normal PC screen connected via DVI suddenly works.
But my HDTV connected via a DVI->HDMI cable does not.

[E-J (ejlamsa)]

I have also this problem, card is ATI HD 3650 AGP, and card doesn't have VGA output, just 2 DVI:s, both show blank screen. I have tried both fglrx and normal radeon driver and both outputs on my Kubuntu 10.10.

[madbiologist (me-again)]

Is this still occurring on Ubuntu 12.04 "Precise Pangolin"?

[bugbot (bugbot)]

We're closing this bug since there has not been a response from the original reporter. However, the issue still exists please feel free to reopen with the requested information. If you're not the original reporter, we'd prefer you file a new bug report.

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