Re: Debian 8 Display corruption and previous desktop revelation during login (nouveau)
On Wed, Apr 29, 2015 at 08:04:35PM +0100, Nick Booker wrote: Hi. I'm getting display corruption during login on the latest Debian 8 (Jessie), installed from scratch on an emptied hard disk. I have the MATE desktop environment, and am using the nouveau graphics driver. This didn't happen with my previous OSes (Debian Wheezy, Linux Mint 17.1 or Parabola GNU/Linux bleeding edge). If I boot my machine from cold, having just plugged in: Boot messages progress to lightdm fine All looks normal while interacting with lightdm After entering my login details, before showing the usual MATE desktop elements and wallpaper, the screen is corrupted for a couple of seconds. During that period it is green with various coloured (mostly purple) dots in seemingly-random places. If I then reboot or shut down and start back up without unplugging and waiting for the motherboard to power down, during my next login, rather than the green with purple dots, I get a collage of bits of my previous session's windows (even some long closed before shutdown) displayed. Please can anyone help me to debug and fix this issue? I haven't filed a bug because I don't know where the issue lies at the moment (kernel/systemd/xf86-video-nouveau/...?) I would suggest filing a bug against the video driver (nouveau, in this case). I would guess that, as an optimization, it's allocating video memory, but not clearing it. Then, when the display comes on, the contents of that memory is shown. I suspect the fix would be to either zero the video memory (so giving you a black screen) or to not activate the display until the first image has been drawn to it. There is a possible security angle here, so report it as a bug and, if it's actually the kernel that should have been responsible for clearing that memory, I'm sure the nouveau people will re-assign the bug. I don't mind poking around source code if necessary with a bit of hand-holding. Selected details from lspci, glxinfo and dmesg in the following paste: [1]http://paste.debian.net/169967/ Thanks, Nick -- Sent from my Android device with K-9 Mail. Please excuse my brevity. References Visible links 1. http://paste.debian.net/169967 signature.asc Description: Digital signature
Re: Debian 8 Display corruption and previous desktop revelation during login (nouveau)
On 30/04/15 09:50, Darac Marjal wrote: I would suggest filing a bug against the video driver (nouveau, in this case). Thanks Darac, I've filed a bug in xorg-server-video-nouveau. In case anyone's interested, here's the bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=783860 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/554273e2.6000...@nickbooker.uk
Debian 8 Display corruption and previous desktop revelation during login (nouveau)
Hi. I'm getting display corruption during login on the latest Debian 8 (Jessie), installed from scratch on an emptied hard disk. I have the MATE desktop environment, and am using the nouveau graphics driver. This didn't happen with my previous OSes (Debian Wheezy, Linux Mint 17.1 or Parabola GNU/Linux bleeding edge). If I boot my machine from cold, having just plugged in: Boot messages progress to lightdm fine All looks normal while interacting with lightdm After entering my login details, before showing the usual MATE desktop elements and wallpaper, the screen is corrupted for a couple of seconds. During that period it is green with various coloured (mostly purple) dots in seemingly-random places. If I then reboot or shut down and start back up without unplugging and waiting for the motherboard to power down, during my next login, rather than the green with purple dots, I get a collage of bits of my previous session's windows (even some long closed before shutdown) displayed. Please can anyone help me to debug and fix this issue? I haven't filed a bug because I don't know where the issue lies at the moment (kernel/systemd/xf86-video-nouveau/...?) I don't mind poking around source code if necessary with a bit of hand-holding. Selected details from lspci, glxinfo and dmesg in the following paste: http://paste.debian.net/169967/ Thanks, Nick -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
Re: Debian 8 Display corruption and previous desktop revelation during login (nouveau)
On 29/04/15 20:04, Nick Booker wrote: Selected details from lspci, glxinfo and dmesg in the following paste: http://paste.debian.net/169967/ Sorry that one was set to expire too quickly. Here's a new one set to expire never: http://paste.debian.net/170024/ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/55413fef.4010...@nickbooker.uk
