From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Decky Date: Thu, 11 Aug 2011 10:57:21 +0000 Subject: Re: [RFC] fbdev: allow multiple concurrent visible consoles Message-Id: <4E43B591.8050009@decky.cz> List-Id: References: <1312799864-3468-1-git-send-email-FlorianSchandinat@gmx.de> In-Reply-To: <1312799864-3468-1-git-send-email-FlorianSchandinat@gmx.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org Hello Florian, > This patch allows having multiple visible consoles that receive > display updates. For example one can have running "top" to monitor > the system on fb0 and at the same time work on a shell on fb1. I hate to report this, because I would really appreciate this feature, but your patch (applied against kernel 3.0) breaks my machine. I have an x86-64 machine with a dual-GPU ATI Radeon HD 4850 X2 (which acts essentially as two discrete R700s) driven by the "radeon" KMS driver. If I use the "fbcon=map:01" boot option to map the even-numbered VCs to the first GPU and the odd-numbered VCs to the second GPU, the kernel patched with your patch encounters some sort of soft-lockup when initializing the second GPU (i.e. creating the fb1) while booting. The is no panic or oops message and I can reset the machine by hitting ctrl+alt+del, but there is no further progress. I can provide further observations if you would like to. Best regards Martin Decky