From mboxrd@z Thu Jan 1 00:00:00 1970 From: Petr Vandrovec Subject: Re: Re: FBdev updates. Date: Sun, 9 Mar 2003 22:29:03 +0100 Sender: linux-fbdev-devel-admin@lists.sourceforge.net Message-ID: <20030309212903.GC16578@vana.vc.cvut.cz> References: <20030220150201.GD13507@codemonkey.org.uk> <20030220182941.GK14445@vana.vc.cvut.cz> <1045787031.2051.9.camel@localhost.localdomain> <20030303203500.GA2916@vana.vc.cvut.cz> <20030304212906.GA1115@middle.of.nowhere> Mime-Version: 1.0 Return-path: Received: from vana.vc.cvut.cz ([147.32.240.58] ident=root) by sc8-sf-list1.sourceforge.net with esmtp (Cipher TLSv1:DES-CBC3-SHA:168) (Exim 3.31-VA-mm2 #1 (Debian)) id 18s8M4-0000Ls-00 for ; Sun, 09 Mar 2003 13:29:12 -0800 Content-Disposition: inline In-Reply-To: <20030304212906.GA1115@middle.of.nowhere> Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: jsimmons@infradead.org Cc: Antonino Daplas , Linux Kernel Mailing List , Linux Fbdev development list Hi James, I tried to use fb_cursor and I have quite a lot problems with it: (1) it uses global variables for storing last cursor value - - but there is no global hardware, so after switching from one fbdev to another you can have cursor with wrong shape, wrong color and so on... (2) callback from timer for cursor blinking may set almost any FB_CUR_* bits. But in this case fb_cursor callback may be called from interrupt context, while accelerator is busy and so on... Did I miss some synchronization? Best for me would be disabling blinking code in fbcon completely: in VGA mode cursor blinks automatically, and in graphics mode more lightweight only 'flash' callback is more appropriate for me. But then there is problem with (3) cursor_undrawn... I have no idea how is this supposed to work if fbdev provides hardware cursor... And HZ/50 delay after putcs makes orientation on screen very complicated, as there is no cursor while new characters are appearing on screen. Thanks, Petr Vandrovec vandrove@vc.cvut.cz ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The debugger for complex code. Debugging C/C++ programs can leave you feeling lost and disoriented. TotalView can help you find your way. Available on major UNIX and Linux platforms. Try it free. www.etnus.com