Problems after replacing an ati videocard by a nvidia card (F20, both 512 MB memory)

[Joachim Backes]

On 07/07/2014 01:06 PM, poma wrote:
> On 07.07.2014 12:11, Joachim Backes wrote:
>> Problem description: replacing my ati video card (DVI) by a nvidia card
>> (DVI too) generates problems: almost unreadable (flickering) screen
>> during boot after some boot progress (even without rhgb), no gdm login
>> screen.
>>
>> The primary F20 system was installed with the ati card.
>>
>> Running "dracut --force" was no solution.
>>
>> After investigating a little bit I saw that the grub boot-parameter
>> "video=1280x1024-24" was the culprit: replacing "video=1280x1024-24" by
>> "video=DVI-D:1280x1024-24".
>>
>> Both the ati card and the nvidia card have a DVI connector.
>>
>> So I can't explain this weird effect. Anybody has an explanation?
>>
>> Kind regards
>>
>> Joachim Backes
>>
> 
> Was ist die ausgabe dieses befehls

ll /sys/class/drm/ (after running the NV card!)

total 0
lrwxrwxrwx 1 root root    0 Jul  7 14:16 card0 ->
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0
lrwxrwxrwx 1 root root    0 Jul  7 14:16 card0-DVI-I-1 ->
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-DVI-I-1
lrwxrwxrwx 1 root root    0 Jul  7 14:16 card0-HDMI-A-1 ->
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-HDMI-A-1
lrwxrwxrwx 1 root root    0 Jul  7 14:16 card0-VGA-1 ->
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-VGA-1
lrwxrwxrwx 1 root root    0 Jul  7 14:16 controlD64 ->
../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/controlD64
lrwxrwxrwx 1 root root    0 Jul  7 14:16 ttm ->
../../devices/virtual/drm/ttm
-r--r--r-- 1 root root 4096 Jul  7 14:16 version

> BTW why are you using 'video=' directive?

Does no come from me! It's part of /etc/default/grub (my system was
installed using the very first F20 alpha, then updating).

Kind regards

Joachim Backes

-- 

Fedora release 20 (Heisenbug)
Kernel-3.15.3-200.fc20.x86_64


Joachim Backes <joachim.backes at rhrk.uni-kl.de>
http://www-user.rhrk.uni-kl.de/~backes