From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 03GNw1cc012242 for ; Thu, 16 Apr 2020 19:58:02 -0400 Received: by smtp.corp.redhat.com (Postfix) id C9D072026983; Thu, 16 Apr 2020 23:58:01 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast01.extmail.prod.ext.rdu2.redhat.com [10.11.55.17]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C61122026D66 for ; Thu, 16 Apr 2020 23:57:59 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DB5CA8056D1 for ; Thu, 16 Apr 2020 23:57:59 +0000 (UTC) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=dkim.mimecast.com; s=201903; t=1587081479; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=QEbk8c+X8U9T9HUgHOvpfqqMe4xQpKPn9Ahrnipc2cM=; b=qRMM5+OpSQ6Hv882dCGg4vxjMTvaHmY19vuCLSG+BgljjT+8EnshFNCSE1R8AoZS+Nk6Rq K7+mXtxvw+H1ESTUojccXuS5yzPYigSkUanceRmffRxUinsrmj4SeEJ0ZZ4sxiLW7P3nJW 2sbCtw32PPz81banmoWdVGJoHW+xVglzG//HVPICpkvsQNV4zGyYQ4FzCSTGiK1N+TqN61 eQe6/blHTnBgc36qn5Q9GDWP3mVvofqA9EToSgKPp+2AImkT4B4JAPTMLFZxHypd6Mr0IU Q4VcsXcK/6YH/Gbj2L7gcJ3Pkkp/+F3ohhuG9CqXydY+r25UZgJMwHIMFergdQ== ARC-Seal: i=1; s=201903; d=dkim.mimecast.com; t=1587081479; a=rsa-sha256; cv=none; b=DPBWvzRvQEHw5KCi/+WfciKaAu78tBLqYLueZligkEKuw7xDNik8NuSoFH6pLUlUgHqtJY V3AasauUMbW39oTfF2v65x7UBDfwSJ9nZYhh3fPl8Rxgys1urpexEuFfdh03iR1kwGyKNZ nKXz13cOaf6NZjW+JqcsgyDjc7VAqZ224dxzvgmIdra0zONS1zvFaKQe1QQn91VgZi8jdd 0Di3YHO+7XCMBpXb4RououHxysoeA5adKFctazqiXxu/fzzZhcJe/7kVkmHaPwgGDDJWdd s2LSgWH6w0X9k+AJVMlZ6km495wy70Qu502kh1HCWfAV8b0A5FpLEYp9d6fKCw== ARC-Authentication-Results: i=1; relay.mimecast.com; dkim=none; dmarc=none; spf=pass (relay.mimecast.com: domain of john@godtouches.org designates 66.170.1.9 as permitted sender) smtp.mailfrom=john@godtouches.org Received: from mailbox.supranet.net (mailbox.supranet.net [66.170.1.9]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-166-w_f5eTFRPmSREiQe57XDWg-1; Thu, 16 Apr 2020 19:57:57 -0400 X-MC-Unique: w_f5eTFRPmSREiQe57XDWg-1 Received: from [68.190.112.237] (port=45310 helo=localhost) by mailbox.supranet.net with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.82 (FreeBSD)) (envelope-from ) id 1jPEOK-000Hzj-H0 for blinux-list@redhat.com; Thu, 16 Apr 2020 18:57:56 -0500 Date: Thu, 16 Apr 2020 18:57:55 -0500 To: Linux for blind general discussion Subject: Can you give me some ideas for debugging these problems? Message-ID: <20200416235755.GA8649@abilitiessoft> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; dkim=none; dmarc=none; spf=pass (relay.mimecast.com: domain of john@godtouches.org designates 66.170.1.9 as permitted sender) smtp.mailfrom=john@godtouches.org X-Mimecast-Spam-Score: 1 Content-Type: text/plain; charset=WINDOWS-1252 Content-Disposition: inline X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 03GNw1cc012242 X-loop: blinux-list@redhat.com From: Linux for blind general discussion X-BeenThere: blinux-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk Reply-To: blinux-list@redhat.com List-Id: Linux for blind general discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Apr 2020 23:58:02 -0000 Helloo Everyone, I will first describe the problems and then ask some questions. I don't claim to be a Linux expert. My ignorance will be evident to the real experts. I have a Debian Buster system with 8 GB of memory. It is less than four years old. Recently I installed Gnome 3.3 with Orca. I use Braille only and no speech, since I am deaf-blind. The Braille display is a Focus 40 connected to a USB port. A technician from a local computer company installed TeamViewer so he could help with problems remotely, but he seems puzzled by the ones I am encountering. When the system boots the desktop comes up on tty1 and ty2. It appears to be functiooning fairly well. TeamViewer is running and asking for a partner. I can run Firefox and surf the web. However, eventually the Braille display becomes unresponsive. It keeps showing the same thing, no matter what I do on the keyboard. Sighted companions tell me the screen is responding appropriately. I can switch to other consoles using ctrl+Alt+Fn and run command-line programs. However, when I switch back to tty1 or tty2 the Braille display acts as if the USB port has been disabled. It appears to have been turned off. Switching to any other console produces the message "no irq handler for vector and BRLTTY5.6. After a while the console behaves normally for command-line use. The desktop seems to disappear completely. I can switch consoles with Alt+Fn. Except to tty1 and tty2, which hang up. Questions: 1. How is the desktop started at boot time? What script or program starts it and how is it called? 2. The problem with the Braille display becoming unresponsive and continuing to show the same thing must be a problem with Orca. It apears to work properly for the most part, but I can't use help mode. I have asked about these problems on the Orca list, but they were no help. 3. The desktop runs functions from several libraries. Which of those might be crashing? How is it possible for something not running as root to produce an interrupt with no handler? Thanks, John -- John J. Boyer Email: john.boyer@abilitiessoft.org website: http://www.abilitiessoft.org Status: Company dissolved but website and email addresses live. Location: Madison, Wisconsin, USA Mission: developing assistive technology software and providing STEM services that are available at no cost