Hi everyone,
On CentOS 7 I'm running into an issue with the latest nvidia driver
from elrepo: kmod-nvidia-384.98-1.el7_4.elrepo.x86_64
This driver version seem to introduce issue in detecting video modes
when a monitor is connected using DVI. As soon as the machine attempts
to start X, nothing happens and the monitor goes into sleep mode
reporting that it has 'no signal'.
It is interesting because it occurs with several monitors, but only
when they are connected through DVI. When using VGA it works like a
charm.
Also it did work without problems with the previous driver version
(kmod-nvidia-384.90-1.el7_4.elrepo.x86_64), with the exact same setup.
In this case the issue occurs with an Nvidia NVS 315. I don't know if
other nvidia cards are affected.
The following information from Xorg.0.log seems of interest:
[ 130.447] (--) NVIDIA(0): Valid display device(s) on GPU-0 at PCI:1:0:0
[ 130.447] (--) NVIDIA(0): CRT-0
[ 130.447] (--) NVIDIA(0): CRT-1
[ 130.447] (--) NVIDIA(0): DFP-0 (boot)
[ 130.447] (--) NVIDIA(0): DFP-1
[ 130.447] (--) NVIDIA(0): DFP-2
[ 130.447] (--) NVIDIA(0): DFP-3
[ 130.448] (II) NVIDIA(0): NVIDIA GPU NVS 315 (GF119) at PCI:1:0:0 (GPU-0)
[ 130.448] (--) NVIDIA(0): Memory: 1048576 kBytes
[ 130.448] (--) NVIDIA(0): VideoBIOS: 75.19.88.00.0b
[ 130.448] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 130.462] (--) NVIDIA(GPU-0): CRT-0: disconnected
[ 130.462] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[ 130.462] (--) NVIDIA(GPU-0):
[ 130.467] (--) NVIDIA(GPU-0): CRT-1: disconnected
[ 130.467] (--) NVIDIA(GPU-0): CRT-1: 400.0 MHz maximum pixel clock
[ 130.467] (--) NVIDIA(GPU-0):
[ 130.488] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): connected
[ 130.488] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): Internal TMDS
[ 130.488] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): 0.0 MHz
maximum pixel clock
[ 130.488] (--) NVIDIA(GPU-0):
[ 130.493] (--) NVIDIA(GPU-0): DFP-1: disconnected
[ 130.493] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[ 130.493] (--) NVIDIA(GPU-0): DFP-1: 0.0 MHz maximum pixel clock
[ 130.493] (--) NVIDIA(GPU-0):
[ 130.493] (--) NVIDIA(GPU-0): DFP-2: disconnected
[ 130.493] (--) NVIDIA(GPU-0): DFP-2: Internal DisplayPort
[ 130.493] (--) NVIDIA(GPU-0): DFP-2: 480.0 MHz maximum pixel clock
[ 130.493] (--) NVIDIA(GPU-0):
[ 130.493] (--) NVIDIA(GPU-0): DFP-3: disconnected
[ 130.493] (--) NVIDIA(GPU-0): DFP-3: Internal DisplayPort
[ 130.493] (--) NVIDIA(GPU-0): DFP-3: 480.0 MHz maximum pixel clock
[ 130.493] (--) NVIDIA(GPU-0):
[ 130.493] (EE) NVIDIA(GPU-0): Unable to add conservative
default mode "nvidia-auto-select".
[ 130.493] (EE) NVIDIA(GPU-0): Unable to add
"nvidia-auto-select" mode to ModePool.
[ 130.493] (==) NVIDIA(0):
[ 130.493] (==) NVIDIA(0): No modes were requested; the default
mode "nvidia-auto-select"
[ 130.493] (==) NVIDIA(0): will be used as the requested mode.
[ 130.493] (==) NVIDIA(0):
[ 130.493] (WW) NVIDIA(0): No valid modes for
"DFP-0:nvidia-auto-select"; removing.
[ 130.493] (WW) NVIDIA(0):
[ 130.493] (WW) NVIDIA(0): Unable to validate any modes; falling
back to the default mode
[ 130.493] (WW) NVIDIA(0): "nvidia-auto-select".
[ 130.493] (WW) NVIDIA(0):
[ 130.493] (WW) NVIDIA(0): No valid modes for
"DFP-0:nvidia-auto-select"; removing.
[ 130.493] (EE) NVIDIA(0): Unable to use default mode
"nvidia-auto-select".
[ 130.493] (EE) NVIDIA(0): Failing initialization of X screen 0
The log shows "0.0 MHz maximum pixel clock" for the DVI connections.
When enabling ModeDebug in the xorg.conf it shows that all of the
resolutions are rejected because of incorrect maximum pixel clock:
[ 1354.589] (II) NVIDIA(GPU-0):
[ 1354.589] (II) NVIDIA(GPU-0): --- Building ModePool for Philips
240S4 (DFP-0) ---
[ 1354.589] (WW) NVIDIA(GPU-0): Validating Mode "1920x1200_60":
[ 1354.589] (WW) NVIDIA(GPU-0): Mode Source: EDID
[ 1354.589] (WW) NVIDIA(GPU-0): 1920 x 1200 @ 60 Hz
[ 1354.589] (WW) NVIDIA(GPU-0): Pixel Clock : 154.00 MHz
[ 1354.589] (WW) NVIDIA(GPU-0): HRes, HSyncStart : 1920, 1968
[ 1354.589] (WW) NVIDIA(GPU-0): HSyncEnd, HTotal : 2000, 2080
[ 1354.589] (WW) NVIDIA(GPU-0): VRes, VSyncStart : 1200, 1203
[ 1354.589] (WW) NVIDIA(GPU-0): VSyncEnd, VTotal : 1209, 1235
[ 1354.589] (WW) NVIDIA(GPU-0): Sync Polarity : +H -V
[ 1354.589] (WW) NVIDIA(GPU-0): Mode is rejected: PixelClock
(154.0 MHz) too high for
[ 1354.589] (WW) NVIDIA(GPU-0): Display Device (Max: 0.0 MHz).
[ 1354.589] (WW) NVIDIA(GPU-0): Mode "1920x1200_60" is invalid.
Note that with the previous driver (version 384.90), a valid value was
detected for the 'maximum pixel clock':
[ 124.804] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): connected
[ 124.804] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): Internal TMDS
[ 124.804] (--) NVIDIA(GPU-0): Philips 240S4 (DFP-0): 165.0 MHz
maximum pixel clock
Since it did work with version 384.90 and stopped working with version
384.98, it looks like a regression in the nvidia driver. What is the
best way to report the issue and get an update in elrepo?
Kind regards,
Danny Smit