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[ubuntu] ATI driver available, not installing

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http://ubuntuforums.org – I just installed Ubuntu Karmic on my new Acer 5534-1121 laptop. According to lspci, I have an Atheros AR928X wireless card. I have an ATI Radeon 3200 HD video card. So when I did the initial install, the ATI driver from the Hardware Drivers app installed and worked. But I was missing wireless drivers, so I didn't even try to set up Compiz, opting instead to fix my wireless problem. So I installed linux-backports-modules-karmic. Rebooted. Wireless worked! Flawless! Only now my ATI driver appears to have broken. There is obvious screen-tearing when I move windows or switch to another desktop. You can actually see the display being redrawn line-for-line, and it's really annoying. So I opened up Hardware Drivers again. It shows the "ATI/AMD proprietary FGLRX graphics driver" as not being activated. I select it and click Activate. I authenticate, then get the "Downloading and installing driver" window for all of 1.5 seconds. That window disappears, returning me to Hardware Drivers. The driver is still not activated. I have used Synaptic to manually remove the ATI driver packages, and still have the same problem. I have then reinstalled those driver packages through Synaptic to no great effect. I uninstalled linux-backports-modules-karmic and expected wireless to quit working. It did not quit working. I am still connected to the Internet and posting this via my wireless network on the laptop in question. Here is the output of lspci: Code: 00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge 00:01.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (int gfx) 00:04.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 0) 00:05.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 1) 00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] 00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller 00:12.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller 00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller 00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller 00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3c) 00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) 00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller 00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge 00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:05.0 VGA compatible controller: ATI Technologies Inc RS780M/RS780MN [Radeon HD 3200 Graphics] 02:00.0 Network controller: Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01) 08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) And here is lsmod: Code: Module                  Size  Used by binfmt_misc            8356  1 ppdev                  6688  0 joydev                10272  0 snd_hda_codec_realtek  203328  1 arc4                    1660  2 snd_hda_intel          26920  2 snd_hda_codec          75708  2 snd_hda_codec_realtek,snd_hda_intel snd_hwdep              7200  1 snd_hda_codec ecb                    2524  2 snd_pcm_oss            37920  0 snd_mixer_oss          16028  1 snd_pcm_oss snd_pcm                75296  3 snd_hda_intel,snd_hda_codec,snd_pcm_oss iptable_filter          3100  0 snd_seq_dummy          2656  0 ip_tables              11692  1 iptable_filter x_tables              16544  1 ip_tables snd_seq_oss            28576  0 snd_seq_midi            6432  0 uvcvideo              59080  0 videodev              36736  1 uvcvideo v4l1_compat            14496  2 uvcvideo,videodev ath9k                307384  0 mac80211              210408  1 ath9k ath                    8444  1 ath9k snd_rawmidi            22208  1 snd_seq_midi snd_seq_midi_event      6940  2 snd_seq_oss,snd_seq_midi dm_crypt              12928  0 snd_seq                50224  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event snd_timer              22276  2 snd_pcm,snd_seq snd_seq_device          6920  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq psmouse                56500  0 serio_raw              5280  0 k8temp                  4188  0 cfg80211              130440  3 ath9k,mac80211,ath led_class              4096  1 ath9k snd                    59204  16 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore              7264  1 snd snd_page_alloc          9156  2 snd_hda_intel,snd_pcm shpchp                32272  0 i2c_piix4              9932  0 lp                      8964  0 parport                35340  2 ppdev,lp dm_raid45              84228  0 xor                    15620  1 dm_raid45 r8169                  32064  0 mii                    5212  1 r8169 video                  19380  0 output                  2780  1 video I think it's important to note that the video problem didn't begin until after the installation of the backports package. Any help you can provide would go a long way, I'm sure. Thanks in advance, Ryan (Hardware)