[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
This is a kernel bug. ** Package changed: xorg-server (Ubuntu) = linux-lts-trusty (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in linux-lts-trusty package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: Xorg.log working radeon. https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4299507/+files/Xorg.0.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: lspci -vv working https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4299509/+files/lspci_working.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: dmesg working https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4299508/+files/dmesg_working.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: More complete stack trace on 3.18 64 bits with 60 lines per screen https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4298722/+files/20150114_205715.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: IGP disabled in BIOS setup. https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4298792/+files/20150114_234953.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: 3.18 32 bits stack trace with 60 lines er screen. https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4298769/+files/20150114_230142.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
https://github.com/alterapraxisptyltd/openatom/issues/1 Quote: [linux] Infinite loop in pci_get_rom_size() This is one of those issues that you find when putting supposedly stable code through unusual situations. I did expect any function in linux that is not part of radeon.ko to not be rock solid. Turns out that's not really the case. If we have a PCIR structure with a zero size length, the loop iterating through those structure does not advance. It simply does image += readw(pds + 16) * 512;, but if that field is zero we're back analyzing the same structure on the next loop. The way to get out of this loop is to set bit 7 of the type field. That's what 'last_image' does. If that bit is not set, with the above, that's an infinite loop. Luckily, it doesn't crash the kernel, but it hangs any driver that calls the function under said circumstances. No more modprobe -r or unbinding. Reboot is needed. No idea why a firmware blob here is treated as trusted input. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: More complete stack trace using softlockup_panic=1 https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4298395/+files/20150114_100952.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: Screenshot of the kernel panic using only radeon.dpm=0 https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4298034/+files/20150114_003043.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: Xorg.log with nomodeset on kernel 3.16.0 https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4296840/+files/Xorg.0.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: lspci verbose output https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4295946/+files/lspci-verbose.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: dmesg output (running catalyst on ubuntu 14.04) https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4295944/+files/dmesg.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
** Attachment added: lspci output https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4295945/+files/lspci.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
[Desktop-packages] [Bug 1386973] Re: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X
I added the kernel parameter softlockup_panic=1 and got a stacktrace. ** Attachment added: Screenshot of the kernel panic https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+attachment/4295558/+files/20150110_221958.jpg -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1386973 Title: Ubuntu 14.10 soft lockup with ATI Radeon R7 250 X Status in xorg-server package in Ubuntu: New Bug description: I have a VGA controller Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X]. When I boot from the Utopic DVD I get to the language menu and I can select try ubuntu without installing, but after a few sencods I get BUG: soft lockup - CPU#0 stuck for 22s!' and the message just repeats every 22 secods forever. I tried setting nomodeset using the F6 menu, but I got exactly the same result. This is Ubuntu 14.10 64 bits which basically seems unable to boot with that hardware. The experience was the same with 14.04, but I thought 14.10 would be better. In 14.04 disabling the video card and booting off the integrated graphics let me set nomodeset in /etc/default/grub and I was able boot with the R7 250X with the VESA driver. Installed Catalyst afterwards. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973/+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
