For SRU: Turning on AGP Fast Writes can hang the chipset on certain
combinations of AGP Radeon cards and northbridges. The fix is a small
patch to xorg-video-ati which disables fast writes unconditionally as
they are only a (small) performance enhancement.
On Edgy, this will diff suffice to minimize code changed by the SRU.
Feisty can be updated with a new upstream version which also contains
the changes (but I've applied the same patch to feisty and it has been
uploaded.)
** Changed in: xserver-xorg-video-ati (Ubuntu Edgy)
Importance: Undecided => Critical
Status: Unconfirmed => Confirmed
** Description changed:
+ [Update by kyle@ for SRU, the problem is the ATI driver can cause the machine
to lock up on AGP-based systems. This is important since effected users cannot
start X. Further information is below including the debdiff for the fix:
+
https://launchpad.net/ubuntu/edgy/+source/xserver-xorg-video-ati/+bug/67487/comments/173]
+
Problem: Failure in booting in to Live Desktop 6.10.
Result: Screen Goes Black after boot phase, right as it enters the
Desktop phase. Must power off to remedy.
Steps to Reproduce:
1) boot x386 CD and DVD (I've tested both)
2) choose either default Start/Install or Safe Graphics Start/Install
3) 6.10 boots and goes along without issue with the new Ubuntu boot splash.
4) It finishes the boot process, then goes to the standard momentary black
screen with the white cursor in the upper-left corner.
5) Then, the screen goes black.
Using F4 VGA options doesn't solve the issue.
note: a signature of this particular bug is that selecting ctrl+alt+F1
through F6 does NOT bring up console either before or after you get a
black screen. As a result, commands to change drivers as a workaround
will not work with this bug, increasing its severity.
Test Specs:
ATI Radeon 9200 SE video card (AGP)
Compaq P1100 21' monitor and Acer 54e monitor
ASUS K8V SE Deluxe mobo
AMD Athlon XP 64 3000+ (I only load the 386 OS on to it, though)
512mb RAM.
note: when noting your specs in your report, please note if your video
card is AGP or PCI-E, if you have an AMD 32 or 64 bit system (or Intel)
and which Edgy OS you are loading. The more info, the better.
Known workarounds: Disable DRI or set AGP speed to 4x in BIOS settings.
--
[regression][rv280] black screen and console freeze when X starts - drm lockup
https://launchpad.net/bugs/67487
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