<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Hi, could anyone explain me some internals of the X server especially the moment of shutting down. I try to install the Debian armel distro with X11 on the Lenovo Tab2 a7-10f tablet without using the vnc, the XServer XSDL or any other remote desktop solutions. Inspired by the tutorials: <a class="moz-txt-link-freetext" href="https://blog.hamal.in/?p=15">https://blog.hamal.in/?p=15</a> <a class="moz-txt-link-freetext" href="https://www.youtube.com/watch?v=t2yj8QYoBhA&list=PLcUid3OP_4OX9q80EIEAWsolQV5cr6RQx&index=4">https://www.youtube.com/watch?v=t2yj8QYoBhA&list=PLcUid3OP_4OX9q80EIEAWsolQV5cr6RQx&index=4</a> I successfully stopped the media/zygote/surfaceflinger services and in the chroot environment I started the xserver. The first problem was that there was no tty0 available (supposed the kernel was compiling without CONFIG_VT=y). After linking /dev/null with tty0 ln -s /dev/null /dev/tty0 and restarting the xserver, there was a complaint about the inappropriate ioctl for device. With this option, the server starts without problems: X -sharevts vt0 but, the display remains black. Next I do as follows: <ul> <li>startlxde (no screen output),</li> <li>stop lxde (no screen output),</li> <li>stop xserver - on the tablet display the last frame from the desktop session appears.</li> </ul> Same behaviour when I do cat /dev/urandom > /dev/fb0 with the running xserver and then stopping them (gray pixels shows up). So my questions: <ul> <li>Where exactly, in this particular example, the X sends the 'last' frame when it shuts down? I mean, is this a file in /dev/ folder?</li> <li>Is it possible to start the xserver and redirect the "graphic stream" directly to that place so I could see the working desktop environment on the tablet (without access to the tty0 )?</li> </ul> X.Org X Server 1.20.1 X Protocol Version 11, Revision 0 [ 8516.256] Build Operating System: Linux 4.9.0-7-armmp-lpae armv7l Debian [ 8516.257] Current Operating System: Linux localhost 3.4.67 #1 SMP PREEMPT Frii Dec 11 22:20:29 CST 2015 armv7l [ 8516.257] Kernel command line: console=ttyMT0,921600n1 vmalloc=496M slub_max__ order=0 lcm=1-nt51012_hd720_dsi_vdo fps=8941 vram=14680064 emmc_id=21 ddr_id=0 bb ootprof.pl_t=2053 bootprof.lk_t=1578 printk.disable_uart=1 boot_reason=4 ~Y [ 8516.258] Build Date: 17 August 2018 08:05:00PM [ 8516.258] xorg-server 2:1.20.1-1 (<a class="moz-txt-link-freetext" href="https://www.debian.org/support">https://www.debian.org/support</a>) [ 8516.258] Current version of pixman: 0.34.0 </body> </html>