The maker of expensive printer ink, HP still is ignoring user complaints that the Nvidia graphics chips it jacked under the bonnet of some of its laptops were faulty.

The problem appeared months ago when users first moaned that defective Nvidia graphics cards were causing laptops to fail. According to PC World users say that they have been treated unfairly by HP, because their laptops are not included on a list of affected machines that was issued last July by HP, so they are ineligible for a free repair or an extended warranty.

For example the Pavilion dv9500 line has its screens going blank or overheats and the system fails. However since the laptop model isn't on HP's list of Nvidia affected laptops it is asking users to stump up for repair.

HP isn't moving quickly to add new laptops to the list of affected PCs either. Its argument is that some of the failures may have nothing to do with the Nvidia chips. However as one user pointed out on a board, no one seems to have heard of HP laptops with ATI parts going tits up.

Other PC vendors, including Dell and Apple, had to address issues related to faulty Nvidia graphics cards. Like HP, Dell issued a software patch to control heating problems, but it attracted a fierce response from unhappy users, who accused Dell of shying away from addressing a larger problem of bad hardware. Apple offered a free repair of laptops.