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Re: Matrox G550 mga driver hangs system

From Felix Miata <mrmazda@earthlink.net>
Newsgroups linux.debian.user
Subject Re: Matrox G550 mga driver hangs system
Date 2017-03-31 11:00 +0200
Message-ID <tr0zv-2ht-9@gated-at.bofh.it> (permalink)
References <tqrLt-34R-41@gated-at.bofh.it> <tqsHv-3Oj-1@gated-at.bofh.it> <tqLh7-GX-3@gated-at.bofh.it> <tqYel-Rs-5@gated-at.bofh.it>
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Felix Miata composed on 2017-03-31 02:22 (UTC-0400):

[xserver-xorg-video-mga is a user-space graphics driver]
...
> If all the above doesn't help, repeat it, but append "iomem=relaxed" to the line
> that included video and/or vesa and/or vga...
This showed up on vtty when I did dist-upgrade from jessie to stretch:

apt-listchanges: News
...
linux-latest (76) unstable; urgency=medium

   * From Linux 4.8, several changes have been made in the kernel
     configuration to 'harden' the system, i.e. to mitigate security bugs.
     Some changes may cause legitimate applications to fail, and can be
     reverted by run-time configuration:
     - On most architectures, the /dev/mem device can no longer be used to
       access devices that also have a kernel driver.  This breaks dosemu
       and some old user-space graphics drivers.  To allow this, set the
       kernel parameter: iomem=relaxed

xorg-server (2:1.17.3-1) unstable; urgency=medium

   The Xorg server is no longer setuid root by default.  This change reduces the
   risk of privilege escalation due to X server bugs, but has some side effects:

   * it relies on logind and libpam-systemd
   * it relies on a kernel video driver (so the userspace component doesn't
     touch the hardware directly)
   * it needs X to run on the virtual console (VT) it was started from
   * it changes the location for storing the Xorg log from /var/log/ to
     ~/.local/share/xorg/

   On systems where those are not available, the new xserver-xorg-legacy package
   is needed to allow X to run with elevated privileges. See the
   Xwrapper.conf(5) manual page for configuration details.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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Thread

Re: Matrox G550   mga driver hangs system Tony Stoneley <ajms@ajms.ukfsn.org> - 2017-03-29 21:50 +0200
  Re: Matrox G550 mga driver hangs system Felix Miata <mrmazda@earthlink.net> - 2017-03-29 22:50 +0200
    Re: Matrox G550 mga driver hangs system "Tony Stoneley" <ajms@ajms.ukfsn.org> - 2017-03-30 18:40 +0200
      Re: Matrox G550 mga driver hangs system Felix Miata <mrmazda@earthlink.net> - 2017-03-31 08:30 +0200
        Re: Matrox G550 mga driver hangs system Felix Miata <mrmazda@earthlink.net> - 2017-03-31 11:00 +0200
        Re: Matrox G550 mga driver hangs system "Tony Stoneley" <ajms@ajms.ukfsn.org> - 2017-03-31 23:40 +0200
          Re: Matrox G550 mga driver hangs system Felix Miata <mrmazda@earthlink.net> - 2017-04-01 00:20 +0200
            Re: Matrox G550 mga driver hangs system Felix Miata <mrmazda@earthlink.net> - 2017-04-02 00:40 +0200
            Re: Matrox G550 mga driver hangs system "Tony Stoneley" <ajms@ajms.ukfsn.org> - 2017-04-03 19:10 +0200

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