Bob Furber, thank you for taking the time to report this bug and helping to
make Ubuntu better. Please execute the following command, as it will
automatically gather debugging information, in a terminal:
apport-collect 922733
When reporting bugs in the future please use apport by using 'ubuntu-bug' and
the name of the package affected. You can learn more about this functionality
at https://wiki.ubuntu.com/ReportingBugs.
** Changed in: fglrx-installer (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/922733
Title:
Inappropriate response to GFX card problem
Status in “fglrx-installer” package in Ubuntu:
Incomplete
Bug description:
The U-11.10 initially boots to a default 1024 x 768 resolution to
display the "Ubuntu" pre-sign-in screen. Then it has problems with the
"ATI/AMD proprietary FGLRX graphics driver" for the Integrated ATI
Radeon HD 4250 GPU on my PC's motherboard.
CURRENT RESPONSE: Black screen with white text "Cannot display this
video mode"
APPROPRIATE RESPONSE: Dialog window offering the option to use the
default graphics or to boot in a different mode. Help button on screen
linking to on-line doc outlining problem and possible solutions.
PC: 64 bit AMD Phenom II
Screen: Dell 1280x1024 60 Hz LCD screen
Video Chip set: ATI Radeon HD 4250 GPU
Video Driver: ATI/AMD proprietary FGLRX graphics driver
Background:
Live CD 11.10 displays well at default 1024 x 768
Ubu 11.10 displays well at 1024 x 768. Since 31-Dec-11, get Black "Cannot
display.." screen when ATI/AMD proprietary FGLRX graphics driver is activated.
Prior to 30-Dec-11, Ubu 11.10 displayed at 1280 x 1024 using the
ATI/AMD proprietary FGLRX graphics driver. It appears support for this
driver was then dropped or broken.
------------------------------- Request for Help Postings
----------------------------------------------------
I first ran into this problem about a week after installing
Ubuntu-11.10 on my new bare bones AMD 64 bit PC with an old Dell
1280x1024 60 Hz LCD screen.
..And, yes, I have tried uncommenting “# GRUB_GFXMODE=640x480” in
/etc/defaults/grub.
With advice from Fantab
(http://ubuntuforums.org/showthread.php?t=1888642&highlight=burnsmicro,
posting #4), I fixed it with a fixresolution.sh script and a link in
/etc/X11/Xsession.d/45fixrandr.
All went well until I fired up my PC after the holidays and the
dreaded “Cannot display this video mode” showed up again when Ubuntu
tries to take final control of the screen after boot-up. I could only
access my PC by booting with a Ubuntu-11.10 LiveCD or booting fom the
HD, followed by Ctrl-Alt-F1 to get past the "Cannot display..".
Several things changed after the last update on 30-Dec-11:
* The link to the fix resolution script was remove from
/etc/X11/Xsession.d/, probably because this folder was overwritten.
However, restoring the link did not remedy the situation.
* “CRT1” is no longer recognized by xranadr. It has changed to
“VGA-0”. However, fixing the resolution restoring script to address
this did not remedy the situation.
Other efforts that failed:
* Changing the resolution restoring script to set a lower
resolution from 1280x1024 60 to 1024x768 60 used successfully by the
Ubuntu-11.10 LiveCD.
* Uncommenting “# GRUB_GFXMODE=640x480” in /etc/defaults/grub.
I did get my display working briefly, yesterday, after reinstalling
Ubuntu-11.10 with updates and 3rd party s/w. It rebooted fine from the
HD. But I broke it again when I "apt-get updated" and then I "apt-get
upgraded". I also tried to update the graphics driver through System
Settings --> Drivers, but I got an error and it did not install (it
had installed without a hitch about a month ago). On rebooting, I got
the dreaded "Cannot display..". Subsequent attempts to install
Ubuntu-11.10 (replace Ubuntu-11.10 by Ubuntu-11.10) have all failed to
resolve the "Cannot display.." issue.
I do not know how to discover what graphics chip is on the motherboard
from the Ctrl-Alt-F1 command line and I cannot discover it with the
LiveCD. In any event, this is not an issue with the LiveCD.
The LiveCD works fine and the [HD] boot screen seems to work fine too.
That is, I get a Bios screen --> black screen --> purple --> purple +
"Ubuntu", dots and some text --> Black + "Cannot display..".
In short, my PC is unusable until I can get the screen to work again.
Worse yet, I am unable to install any updates that may have resolved
the "Cannot display.." issue.
I cannot say how grateful I would be for some help.
Thanks,
RF
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/922733/+subscriptions
--
Mailing list: https://launchpad.net/~desktop-packages
Post to : desktop-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~desktop-packages
More help : https://help.launchpad.net/ListHelp
