[Pkg-tigervnc-devel] Bug#855350: nomodeset parameter solved it for me

[Pierre Dinh-van]

Hi,

I just got the same problem on a lenovo computer after installing
stretch on it:

    Manufacturer: LENOVO
    Product Name: 3235H3G
    Version: ThinkCentre M92

It has this graphic card :

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd
Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA
controller])
    Subsystem: Lenovo Xeon E3-1200 v2/3rd Gen Core processor Graphics
Controller
    Flags: bus master, fast devsel, latency 0, IRQ 11
    Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
    Memory at e0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at f000 [size=64]
    [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
    Capabilities: [90] MSI: Enable- Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [a4] PCI Advanced Features
    Kernel modules: i915

The VNC Config file is in /usr/share/X11/xorg.conf.d/99-vnc.conf :

Section "Module"
    Load  "vnc"
EndSection
Section "Screen"
    Identifier "Screen0"
    Device     "Card0"
    Monitor    "Monitor0"
    Option "QueryConnectTimeout" "30"
    Option "AcceptSetDesktopSize" "0"
    Option "IdleTimeout" "60"
    Option "SecurityTypes" "VncAuth"
    Option "QueryConnect"
    Option "UserPasswdVerifier" "VncAuth"
    Option "PasswordFile" "/etc/vncpasswd"
EndSection

The X session was just unusable on this computer, the mouse really slow,
and no process in top seemed to take resources. There was no EE messages
in Xorg.0.log

When I saw in the message #22 '(EE) modeset(0): failed to set mode:
Permission denied', I tried to reboot the computer with the kernel
parameter "nomodeset" and it solved the issue for me. I'm now going to
install the rest of my computers with nomodeset, since my users never
use the console.

Kernel version :

Linux enzio 4.9.0-4-amd64 #1 SMP Debian 4.9.51-1 (2017-09-28) x86_64
GNU/Linux


Cheers

Pierre