Red Hat Bugzilla – Bug 22659
laptop display problem while installing
Last modified: 2007-04-18 12:30:17 EDT
On an Inspiron 3500 with a Neomagic 256AV chipset, the framebuffer works
fine during installation right up until I click 'Test Settings' for 16-bit
1024x768 display. The test card looks fine, but when I click on 'Yes, I
can see this' the X configuration screen I came from is _all_ messed up:
most of the colours are black.
- online help panel is entirely black
- radio buttons are entirely black (can't see which is selected any more)
- shadow man's face is black, although his hat is red
- 'redhat Linux Beta 1' is black with white outline
- while installing, status panel is black so I can't see how many packages
to go etc.
Assigning to a developer.
When you get to the syslinux prompt, try typing 'nofb' This should force the
installer to skip framebuffer mode and try the regular X server instead. I'm
trying to figure out if this is a framebuffer problem.
With 'nofb' the problem doesn't happen.
This is what we were afraid of. Some video cards do not work well with
framebuffer mode. Some of them will fail when the graphical installer first
tries to come up. If it fails here, we can catch the error and start a
non-framebuffer X server. However, if it fails later in the installation, as in
this case, then we're in a bit of a bind. We can't fall back and the user
probably can't go forward if they can't read the screen.
Did you pass any special video modes at the syslinux prompt? Like vga=791 or
something like that?
No. The first time I just hit enter; the second time just 'linux nofb'.
Can you give me the output of lspci?
00:00.0 Host bridge: Intel Corporation 440BX/ZX - 82443BX/ZX Host bridge (rev
00:01.0 PCI bridge: Intel Corporation 440BX/ZX - 82443BX/ZX AGP bridge (rev 03)
00:04.0 CardBus bridge: Texas Instruments PCI1220 (rev 02)
00:04.1 CardBus bridge: Texas Instruments PCI1220 (rev 02)
00:07.0 Bridge: Intel Corporation 82371AB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 02)
01:00.0 VGA compatible controller: Neomagic Corporation [MagicMedia 256AV] (rev
01:00.1 Multimedia audio controller: Neomagic Corporation [MagicMedia 256AV
Audio] (rev 20)
Thanks. We've reproduced the problem on an IBM Thinkpad with a neomagic
graphics board. On our machine, after testing X, all the white areas of the
screen have turned purple. Very odd.
This defect is considered MUST-FIX for Florence Gold release
This isfixed now in cvs. Brock, please verify. I can point you toward a
laptop with this graphics chip. What happends is that we don't try to use the
framebuffer server on NeoMagic cards anymore.
verified the test setting works with a laptop with this chipset for 1024x768 @
16 bit (Neomagic (laptop/notebook)) ... this was verified in qa0118.2 test tree