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I am running Ubuntu 13.10 on my PC with 2x Sapphire Radeon HD 7950. After I installed fglrx, ran sudo aticonfig --adapter=all --initial and rebooted, I get a black screen.

When I go into recovery mode and run fglrxinfo, it gives me the following output: unable to open display (null)

When I looked on the ubuntu forums someone suggested I run aticonfig --acpi-services=off but unfortunately this doesnt seem to have any effect.

I should also mention that I previously had an install with fglrx on this system which worked fine. At some point this black screen appeared. After that I decided to reinstall Ubuntu, which works fine until I install fglrx again.

Does anyone have some suggestion? Any help would be appreciated, and I would be happy to provide more information if needed.

Thanks in advance!

jaspervdmaarel
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3 Answers3

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The only way to get out of there is to get out of this situation is to get to a recovery console.

Hold Shift key on boot up.

Once you are on the GRUB menu, choose a recovery mode. Then, choose a root console.

Once you manage to get to a recovery console as root:

apt-get autoremove fglrx
reboot
cochisebt
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A BLACK screen is the result of a normal Catalyst install from the Vendor with Ubuntu 13+. I have incorporated the patch into the Knary (sourceforge) https://sourceforge.net/p/knary/discussion/general/thread/2ad755b9/?limit=25#1b3c AMD installation. But here it is for those interested in manually applying.

-- Download the catalyst 13.12 into any directory. Create this file...Here is a cat command to do this...

cat > 1310patch <<EOF
989,1001c989,1004                      
 < 
 < #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,3)    
 <     if (!ACPI_SUCCESS(acpi_get_table_with_size(id, 0, &hdr, &tbl_size)))
 < #else
 <     tbl_size = 0x7fffffff;
 <     if (!ACPI_SUCCESS(acpi_get_table(id, 0, &hdr)))
 < #endif
 <     {
 <         return KCL_ACPI_ERROR;
 <     }    
 <     ((acpi_table_handler)handler)(hdr);
 <     return KCL_ACPI_OK;
 < }
 ---
 >     #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,3)    
 >         if (!ACPI_SUCCESS(acpi_get_table_with_size(id, 0, &hdr, &tbl_size)))
 >     #else
 >         tbl_size = 0x7fffffff;
 >         if (!ACPI_SUCCESS(acpi_get_table(id, 0, &hdr)))
 >     #endif
 >         {
 >             return KCL_ACPI_ERROR;
 >         }
 >     #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,1)
 >         ((acpi_tbl_table_handler)handler)(hdr);
 >     #else
 >         ((acpi_table_handler)handler)(hdr);
 >     #endif
 >         return KCL_ACPI_OK;
 >     }
EOF

-- Run this Code which will backup, then patch the cat module as shown...

sudo apt-get install dpkg-dev debhelper dh-modaliases execstack dkms
sudo chmod a+x amd-catalyst-13.12-linux-x86.x86_64.run
sudo ./amd-catalyst-13.12-linux-x86.x86_64.run --extract 1310patch
MYsave=date +%B%d%Y%H%M%S
sudo cp 1310patch/common/lib/modules/fglrx/build_mod/kcl_acpi.c 1310patch/common /lib/modules/fglrx/build_mod/kcl_acpi.c.${MYsave}
sudo patch -i ./1310patch 1310patch/common/lib/modules/fglrx/build_mod/kcl_acpi.c
cd 1310patch
sudo./ati-installer.sh 13.251 --buildpkg Ubuntu/saucy

-- now install the packages as the compiled correctly -- install the resulting packages in order is best

sudo dpkg -i fglrx_
sudo dpkg -i fglrx-dev
sudo dpkg -i fglrx-a*

-- catch all

sudo dpkg -i *.deb

FORCE Uninstall

BLACK screen --

Ctrl+Alt+F1 ...Login...
sudo /usr/share/ati/amd-uninstall.sh --force
sudo /usr/share/ati/fglrx-uninstall.sh --force
sudo reboot

Viola!

user246327
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i have gone through same problem and tried every thread but of no use.finally this worked hope it works for others too. start the computer when black screen comes press- ctrl+alt+f1 after that it will ask for log in & password,then type- # sudo -i to enter in root command and lastly type-# apt-get remove --purge fglrx after its done type-# shutdown -r now to shutdown.restart and you are done.

kashyap
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