From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 73530] Asus U38N: Black screen with Radeon driver in Linux Date: Sun, 10 May 2015 17:26:10 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0542743285==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id AAF296E24F for ; Sun, 10 May 2015 10:26:10 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0542743285== Content-Type: multipart/alternative; boundary="1431278770.356e3F8c2.19091"; charset="UTF-8" --1431278770.356e3F8c2.19091 Date: Sun, 10 May 2015 17:26:10 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=73530 --- Comment #80 from N.Leiten --- For long time digging radeon drivers I got it working perfectly. As I mentioned above, the problem is in DP initialization. Somewhere in code DPCD get NULL'ed and function radeon_dp_get_dp_lane_number in atombios.c returns 1 lane which is not right (now I hardcoded return 2, cause dpcd[0x002] is '0'). It seems to be a general problem for FHD panels with DisplayPort and radeon GPU due to same BUGs commited in bugtracker. I'll continue digging at this BUG and recheck with SpreadSpectrum enabled. After that provide patch. -- You are receiving this mail because: You are the assignee for the bug. --1431278770.356e3F8c2.19091 Date: Sun, 10 May 2015 17:26:10 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 80 on bug 73530 from 
For long time digging radeon drivers I got it working perfectly.

As I mentioned above, the problem is in DP initialization. Somewhere in code
DPCD get NULL'ed and function radeon_dp_get_dp_lane_number in atombios.c
returns 1 lane which is not right (now I hardcoded return 2, cause dpcd[0x002]
is '0').

It seems to be a general problem for FHD panels with DisplayPort and radeon GPU
due to same BUGs commited in bugtracker.

I'll continue digging at this BUG and recheck with SpreadSpectrum enabled.
After that provide patch.

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