From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 45641] Screen goes black randomly Date: Tue, 19 Mar 2013 14:22:41 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0039765059==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id DF967E6124 for ; Tue, 19 Mar 2013 07:22:41 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0039765059== Content-Type: multipart/alternative; boundary="1363702961.bb2B1.12486"; charset="us-ascii" --1363702961.bb2B1.12486 Date: Tue, 19 Mar 2013 14:22:41 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=45641 --- Comment #13 from Alex Deucher --- (In reply to comment #12) > Interesting: If I connect only one monitor (either on cable 1 or 2), it > works well. The blinking is caused by data underflow to the display controllers. All clients on the GPU (displays, 3D engine, etc.) contend for memory bandwidth. If you have a card with limited memory bandwidth (like yours), you may get underflow if there is not enough bandwidth to service the displays at a particular moment in time. Running several large monitors increases the memory bandwidth requirements. The display watermarks may need some fine tuning for situations like yours. Additional things to try: 1. try a lower refresh rate 2. Disable acceleration (Option "NoAccel" "True" in the device section of your xorg.conf) 3. Disable Tiling (Option "ColorTiling" "False" in the device section of your xorg.conf) 4. Try mesa 9.1 or newer. -- You are receiving this mail because: You are the assignee for the bug. --1363702961.bb2B1.12486 Date: Tue, 19 Mar 2013 14:22:41 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 13 on bug 45641 from 
(In reply to comment #12)
> Interesting: If I connect only one monitor (either on cable 1 or 2), it
> works well.

The blinking is caused by data underflow to the display controllers.  All
clients on the GPU (displays, 3D engine, etc.) contend for memory bandwidth. 
If you have a card with limited memory bandwidth (like yours), you may get
underflow if there is not enough bandwidth to service the displays at a
particular moment in time.  Running several large monitors increases the memory
bandwidth requirements.  The display watermarks may need some fine tuning for
situations like yours.  Additional things to try:
1. try a lower refresh rate
2. Disable acceleration (Option "NoAccel" "True" in the device section of your
xorg.conf)
3. Disable Tiling (Option "ColorTiling" "False" in the device section of your
xorg.conf)
4. Try mesa 9.1 or newer.

You are receiving this mail because:
  • You are the assignee for the bug.
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