Red Hat Bugzilla – Bug 233665
via driver is vbe-based
Last modified: 2018-04-11 08:50:18 EDT
Description of problem:
The via driver is refusing to use 1680x1050, instead
forcing 1400x1050 and thus creating a highly suboptimal
display on my widescreen LCD panel.
Version-Release number of selected component (if applicable):
(II) Loading /usr/lib/xorg/modules/drivers/via_drv.so
(II) Module via: vendor="X.Org Foundation"
compiled for 7.1.1, module version = 0.2.1
Hook up an LCD panel with native 1680x1050 resolution, start
X in the usual (init 5) way, see what you get, and read the
Xorg.0.log. I used an Acer LW2223W 22" widescreen LCD
on a Via-KM400-based system.
Steps to Reproduce:
1. hook up 1680x1050 LCD monitor (I used VGA rather than DVI)
2. power up via-km400-based system
3. see suboptimal display, collect info about it.
1400x1050 display, distorted
1680x1050 display (monitor's native mode)
I also crafted a specific Modeline based on
the EDID information. You'll find that in the
xorg.conf I'll be attaching along with the
Created attachment 150780 [details]
Xorg logfile showing the details as the correct mode is skipped
Created attachment 150781 [details]
xorg.conf file with EDID-crafted Modeline
Note that the bug happens with the default xorg.conf as well... attaching
this one that specifies the correct mode that via-drv should be using.
Mass migration: via -> openchrome.
Please retry with xorg-x11-drv-openchrome. This is the successor to
xorg-x11-drv-via. KM400 supports any mode, so you should be able to use the
native resolution of your lcd panel.
Hard to do, there's now an NVidia card in that box, and I believe the onboard
VGA gets disabled by the BIOS in that case. It's also running an older
Unless there's a way that X could use both the onboard and AGP adapters?
(In reply to comment #5)
> Hard to do, there's now an NVidia card in that box, and I believe the onboard
> VGA gets disabled by the BIOS in that case. It's also running an older
Which Fedora release is this based on ? I can build for other releases than F7
and F8 if needed.
> Unless there's a way that X could use both the onboard and AGP adapters?
Unfortunately, not to my knowledge.
Actually, I own a KM400 myself, so I'm pretty sure this bug can be closed, but
I'd be grateful if you can find a bit of time to remove the nvidia card and test
studio ~]$ cat /etc/fedora-release
Fedora Core release 6 (Zod)
00:00.0 Host bridge: VIA Technologies, Inc. VT8378 [KM400/A] Chipset Host Bridge
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
01:00.0 VGA compatible controller: nVidia Corporation NV11 [GeForce2 MX/MX 400]
So I'll indeed have to yank the nVidia board, can't see the VIA VGA with it in
BTW, the reason the machine is still on FC6 is that I want to be sure that
libfreebob still works, and with the firewire stack changes, I haven't yet
checked on the F7/F8 status. I can try updating if my firewire audio stuff is
likely to work with the latest stuff.
Here's a build for FC6 :
John, did you had time either to test the FC6 package or to update to a
supported release and test with the latest openchrome driver ?
Reporter, could you please reply to the previous question? If you won't reply in
one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
Since there are insufficient details provided in this report for us to
investigate the issue further, and we have not received feedback to the
information we have requested above, we will assume the problem was not
reproducible, or has been fixed in one of the updates we have released for the
Users who have experienced this problem are encouraged to upgrade to the latest
update of their distribution, and if this issue turns out to still be
reproducible in the latest update, please reopen this bug with additional
Closing as INSUFFICIENT_DATA.